Thomas Ernst: Restoring Scarlatti.
The following restoration of the texts of Domenico Scarlatti’s sonatas and the restoration of their proper pairings is based on musical principles and not on unfounded editorial prejudice as to what constitutes a “control source”. Chopin and Liszt played Scarlatti ed. Czerny, Carlo Zecchi recorded Scarlatti ed. Bülow, Bela Bartók and Wanda Landowska recorded Scarlatti ed. Longo. Since Kirkpatrick, everyone plays Scarlatti ed. Venezia. While the counterpoint Bülow added to K259 is beautiful, and while Longo’s texts clearly were musical arrangements stripped of dissonances and arranged in suites the composer never intended, most of the texts of the Venezia-set (V) after V52:a are more deteriorated than their counterparts – if extant – in Münster (M), Zaragoza (Z), Cary (Ca), Parma (P). Venezia has been given “control-set”-status because of its burgundy morocco binding (Kirkpatrick) and royal provenance (Fadini, Texting) and because it supposedly contains the greatest number of pieces. No one has ever provided one musical reason for this preference. V42 and V49 do not belong to the set proper. Playing Scarlatti from V means playing music mostly copied from Parma (P), and playing innumerous details which Scarlatti never composed. Currently there exist no musical standards for the evaluation of the textual sources of Scarlatti’s keyboard music. Amassing quantities of supposed variants into a musically meaningless computerized AI-supertext while disregarding the difference between primary and secondary sources and the different copying standards applied by the various scribes obfuscates a musical understanding of Scarlatti’s sonatas. The royal provenance of V and P has ever since overshadowed the textually more accurate collections M and Z. There are obvious reasons why the copyists of Ca, M, P, V, Z copied differently, but these reasons remain unexamined. Ca, M, P, Z all copied from the autographs, but with different standards. These standards can be explained.
Because Scarlatti was still alive during the assembly of his “Collected Works”, he is expected to have overseen the copying process, but he demonstrably could not have done so because of the numerous pairing mistakes in all collections, and numerous copying errors in P and V in particular. In 1772, the 73-year-old composer and singer Johann Adolf Hasse admitted to Charles Burney that his “Cantatatas, Serenatas, Intermezzos, and Duets, for voices; his trios, quartets, and concertos, for instruments, were so numerous, that he should not know many of them again, if he was either to see or hear them. […] he […] had more pleasure in producing, than in preserving his offspring.” (Burney II, p. 108). Haydn made a similar remark about his early compositions. Scarlatti was 66 when the re-collection of his sonata-pairs began which he likely had stopped composing years earlier. Why is he expected to have properly re-assembled every last sonata pair after they had been archived for many years during which time many of their sequences became disturbed?
Musical evidence shows that Scarlatti composed most of his sonatas in pairs, but despite the evidence that the composer himself provided, there exists no comprehension of how he paired his sonatas. The pairings of V are used as guidelines, although V is a secondary source and textually more corrupt than M, P, Z, Ca. An awareness of Scarlatti’s pairing principles makes it evident that many authentic pairs in the same key had become separated into singletons, were mismatched, or even tripled and quintupled by 1751 when the series of Scarlatti’s “Collected Works” were initiated. The likely explanation is that Scarlatti had stopped composing new sonata pairs years before, and that during their “archived state” the sonatas had been revisited, perhaps been played again, and were “reshelved” in the wrong order. This disorder affected the “earlier” sonatas more than the works copied in 1756 and 1757. Performing K240 without its original partner K348 is playing amputated music. K347 was originally preceded by K121. K259 does not belong with K260 – both are in 3/4 and have no thematic connections – but it precedes K235 to form one of at least nine Christmas-sonata pairs. Though Kirkpatrick put the pairings into the limelight of how Scarlatti composed, neither he nor anyone since has explained the principles of pairing.
A musically guided examination of the texts of Scarlatti’s sonatas, without preconceived notion of “control-texts”, shows that Scarlatti composed the majority of his sonatas in pairs. Pairs are always in the same key. Most pairs are in the same tonality, but major can be followed by minor, and minor by major. Pairs are never in the same meter, i. e. 3/4 never follows 3/4. K259 and K260, for example, were archived together erroneously: K259 originally K235, and K260 originally preceded K241. A slower partner is always followed by a faster one. The exception are minuets and fugues, which are always in end-position. Slow partners are never matched with slow partners, fast ones never with fast ones. The two sonatas in f, K386, “Presto”, and K387, “Veloce è fugato”, are both fast seconde and were archived together erroneously. All partners of a pair are thematically or motivically linked. When using the same theme in the secunda, Scarlatti altered it rhythmically. Paired sonatas beginning with a single voice often begin in opposing motion, i. e. entry SA versus BT. The same melodies sometimes occur in different voices. Scarlatti uses all known compositorial procedures to link two pieces of keyboard music. Several pairs indicate that they were originally combined: the pairs in A♭ and b♭, for example, were composed and performed together. Scarlatti composed a large group of sonata-pairs for religious holidays, specifically Easter, Christmas, and Holy Week. Scarlatti’s musical symbolism in his sonatas is as identifiable as that of Bach in his cantatas. Scarlatti’s Easter sonatas, for example K215•135, will depict the crucifixion, the lament about Christ’s death, and express the joy over his resurrection. Scarlatti’s Christmas sonatas, for example K189•202, depict human rue and penitence and anxiousness for redemption, the birth of Christ (siciliano), a recessional of the players, and the joy over Christ’s birth. The Holy Week sonata-pairs, for example K380•381, link parade-like processionals and ensuing festivities, often flamencos.
Some characteristics of Scarlatti’s musical notation. He wrote some key signatures “staggered” instead of in cycles of fifths, e. g. a♭, b♭, e♭ instead of b♭, e♭, a♭ for the key of f, here the beginning of K466 in M:

Likewise, he notated multiple sharps compressed on top of eachother rather than stretched out in conventional fashion. Scarlatti tended to indicate innertextual repeats by encasing the measures to be repeated within repeat marks rather than writing them out again. Cary indicates the repeat of mm. 45-52 in K470 (missing trills) by paragraph-like signs:

Scarlatti did not always write out repeating ornaments either if the musical context made them obvious, such as the twenty right- and left-hand trills in K470. In two cases Scarlatti Indicated key signature changes by omitting the previous key signature instead of placing a ♮, for instance when changing from D (♯♯) to d (– instead of ♮♮) between K509 and K510, or from c (♭♭) to C (– instead of ♮♮) between K526 and K527. The ♮♮ in P are editorial. As Soler attested in his Llave de Modulación (1762), Scarlatti indicated double-sharps with single sharps if the key signature already contained a sharp. For example within the key signature of f♯, a gx would have raised the g not to the note a but cumulatively to the note a♯ instead (= g♯ + x). Like other composers, for example Chopin, Scarlatti placed accidentals melodically or vocally before notes that had been altered before and returned to their previous stage regardless of whether the accidentals already constituted part of the key signature. M retained these melodic accidentals, for example in K466 a return from b♮ to b♭, P omitted them.
The collections Münster (M), Parma (P), Zaragoza (Z) and Cary (Ca) were independently copied from Scarlatti’s autographs and not from eachother. Only a small section of M5 was copied from Boivin prints. M contains the most precise copies of the sonatas. Sheveloff’s copyists “M1” and “M2” (the latter first identified as Antonio Reggio by Klaus Kindler) preserved many rhythmic and voice-leading details which P omitted or smoothed out. Z is as valuable as M – vide for example K202 and K226 – but José de Nebra’s scribes tended to omit more text. P was copied by a professional paid scribe whose main goal was efficieny and a clean textual appearance. He regularized rhythmic details if the sonata contained no precedent for them, such as turning 16th notes followed by an eighth note into triplet eighths (K466), smoothed 32nds into 16ths (K226). P often simplified or dropped voice-leading details such hemiolic ties in K510, dropped notes (K474), sometimes intentionally omitted text (end of K304), sometimes mistakenly (left hand in one measure of K190). Some passages he downright falsified for the purpose of regularization and smooth appearance (extreme example K474). Almost all of Venezia (V) from V52b onward was copied from P. V copied all of P’s mistakes, and added his own. The copyist of Cary was a performer-composer who copied from Scarlatti’s autographs, but he not only rewrote entire measures of Scarlatti’s sonatas to fit the range of his one manual instrument (ceiling d3), but also re-composed entire sonatas such as K2 (change of harmonies, voice-leading, composition of additional measures). The Cary ms. does not contain variant readings by Scarlatti, but all its alterations were intentionally effected by the scribe. The French collection Pièces de Clavecin from the mid 1730s contains superior readings of K125 and K179 and 182 [https://gallica.bnf.fr/ark:/12148/btv1b10509646r?rk=214593;2]. The ms., which survives in three fragments, was likely assembled by Marguerite-Antoinette Couperin (1705–1778), who was “ordinaire de la musique de la chambre du roi pour le clavecin” from 1730 to 1741, and also taught the daughters of Louis XV. – Scarlatti did not oversee the print of his Essercizi, as already the missing hand disposition indications in K1 prove, a vestige of which survives in Cambridge-Fitzwilliam. – Several pieces which Kirkpatrick attributed to Scarlatti because they were printed by Boivin or added by Albéro at the end of the Worgan-manuscript can for musical reasons not be by Scarlatti: K95, K142-146. Sheveloff already raised doubts about these in 1970.
A few illustrations of textual deterioration in the mss., most in V. All of the few alterations exemplified below – there are many more – do not constitute variant readings, but are scribal errors.
K125. The first bar begins on two trills and two appoggiature, as the Pièces de Clavecin from the 1730s have it. P omitted the trill in the right hand, but copied the appoggiature correctly. V49 not only omitted both trills, but copied the appoggiature as ties between between the g2:

K179. m. 45 between 𝄇 𝄆. Pièces de Clavecin has encased repeat marks, the tie leaning into measure 46, and the c#-appogiatura. P centered the repeat tie because the second half continues on the verso, has the c#-appogiatura, and added Volti presto, likely copied from Scarlatti’s autograph who layed out his sonatas v-r-v-r (Münster). V, copied from P, shows the greatest deterioration: no first repeat bar, accordingly no repeat tie and no Volti presto; and omission of the # before the c-appoggiatura. Gilbert and Fadini, despite P, printed the defective version, emending the sharp. Instead of continuing directly into the second half, as Scarlatti intended, the player takes a Sitzbad on a measure which deflates the transition to the second half:

K190. In P52c:11, 20v, m. 34, the lower staff is blank. V52b:19, f. 36v copied from P and likewise left the left hand blank. It was filled in by another hand (lighter ink, smaller note heads; perhaps María Bárbara) by comparison with the preceding m. 33. Z4 and M5 are not yet available online, but Ay:14 has the composer’s complete measure 34:

Gilbert and Fadini printed V’s emendations.
K202: P52c:12 dropped measure 74 which is present in M5:39 and Z4:56:

The scribes of M and Z, who both copied from the autographs, had no reason to invent this polyphonic measure. They copied what they saw. The missing m. is musically necessary because it continues the stepwise progression of the bass, e-[d]-c♯, and transits with four-voice chords to the five-voice chords. Fadini was not given access to Z but found the measure in M5 (not yet available online). Because she considered M an inferior source, she relegated it to the commentary and, like Gilbert, created a defective main text.
K226: K226, mm. 48-49 show textual deterioration from Z (quoted from YN, p. 335) to P to V. Z preserved the 32nds in m. 48 with the the melodic a2 and the appoggiatura in m. 49. P, who copied from the same source as Z, regularized the rhythm into continuous 16ths (cf. K466 below) and dropped the a2, but kept the appoggiatura. V copied from P and overlooked the appoggiatura:

Why would Z have changed the rhythm and added a note to the soprano unless this is what he saw in the autograph? The 32nds are melodically justified because the ascending and descending melody moves in scale steps. The 32nds are rhythmically justified after the climatic “long breath” of the tied-over g2 from m. 47. Z has the most, V the least accurate text.
K466. The ascending triplets on the fourth beat in the second half of K466 are a scribal emendation by P, and from there copied into V. The correct rhythmic values were preserved in M. In print, the musically unjustfied prejudice against M has suppressed the authentic readings:

M had no reason to invent a rhythmic pattern that occurs nowhere else in K466 and to repeat it. The repeated g followed by two 16ths adds dramatic tension to the fourth beat. P repeatedly smoothed out rhythmic deviations by textual precedent (more below); V copied the same inaccurate rhythm shows therefrom P.
K. 474. In m. 17 of the first half the bass line continues f1-f-B♭. In the parallel m. 46 of the second half, the E♭ is present in M and Ca but was omitted in P and accordingly in V who copied P:

P and V are obviously defective, but since Gilbert and Fadini established them as primary sources, despite their awareness of M, they amputated the bass line of the E♭ in their main texts, and performers do not play it.
K474. The concluding mm. were manipulated by the scribe of P in order to conform with the parallel mm.of the first half. K474 has 56, not 54 measures. P, analogous to the first half, compressed mm. 51-54 into two mm. of 16ths, but without the repeats of the first half, and, by doing so, amputated the soprano voice. M and Ca render the passage in four mm. of eighths, with the expressive melodic turn a♭2– f2 in the soprano (in Ca erroneously g2). Why would M and Ca rewrite this passage in eighths and invent a melodic turn for which there is no precedent in the first half unless it originated with Scarlatti’s autograph? M and Ca also affixed the necessary ♭ before the a1 (key signature ♭♭) which P omitted while rewriting the text:

Gilbert and Fadini quietly substituted the missing a♭. Fadini, without a musical explanation, called the four mm. in M “sostituite” for the two compressed mm. in P and V. It is musically evident that the readings of M and Ca are correct, and that P melodically and rhythmically regularized the text by compressing it to mirror the mm. of the first half. And, if the 16ths were authentic, Scarlatti would have repeated them, as he did in the first half:

At the end of the first half the 16ths are musically necessary because they lead into the agitated development at the beginning of the second half. To conclude the sonata Scarlatti restored the calm by returning to the initial syncopated eighth notes of the first three mm. and end on ornamented quarter notes which echo the initial trills. The music begins on two quarter notes, changes to syncopated eighths on the third beat, and initiates the movement of 16ths not until the third beat of m. 3 (mm. 1-3, from M):

The four mm. of eighths at the end of the second half do not require a repeat. The readings of P and V are melodically and rhythmically incorrect. If the musical reader is not yet convinced, please play the authentic version and the corrupted “condensed” edit by P and V.
K488, mm. 10 et sim.: M preserved Scarlatti’s incisive rhythmic pattern of two 16ths + one eighth throughout the piece, which P, likewise throughout the piece, regularized to conform with Scarlatti’s real triplets which do not enter as a rhythmical pattern until m. 18 et sim on the second, third and fourth beat, not the first. Scarlatti wanted two different rhythms, why would M invent, an editor ignore them? P assimilated these separate rhythmical patterns into one and completely flattened the music:


K489 m. 109: the upper voices d1-c1 are present in M (parallel to m. 105), omitted in P, V. The decapitated version is in print, not M:

K506. In the second half of K506 the four mm. 76-79 are transposed an octave lower in mm. 82-85. M has mm. 82-85 complete, P omitted mm. 84-85, and so did V which was copied from P. Another example that V has no source value here. Gilbert actually added the missing mm. but Fadini relegated M’s correct version to the commentary, calling M’s mm. “aggiunte”, and adopted V’s defective version for her main text:

K510 is polyphonically complex. M copied correctly all the tied hemiolias held over from weak beats to strong beats across three bars, as in mm. 6 ff., 36 ff., 41, 46 ff., 49 ff., 100, 102, 105 and elsewhere. P repeatedly shifted the accents back to the first beat. Mm. 5-7 are correct in M only, as the parallel bars 9-12 prove, but wrong in P, copied from there into V. The d2 is held over from the second beat of bar 5 to the first beat of bar 9, as the repetition shows. Gilbert quietly corrected the mistake, Fadini did not: in her m. 7 you play a d on the first beat, because V said so:

Likewise P disregarded the held over hemiolic tenor notes a in mm. 36-39 and sim. M holds each a on the third beat of mm. 36, 38, 40. In P (→ V) the rhythmic pattern remains intact only from m. 36 to 37 but disintegrates at m. 38. In this case both Gilbert and Fadini integrated the mistake into their main text:

The same applies to all similar passages in K510. P regularized and simplified these rhythms likely because of inattentiveness and copying fatigue. K190 (see above) suggests that P copied right hand first, left hand second. P’s tied dotted half notes on the first beat are rhythmically meaningless. They were printed according to P/V because they occurs in the “control-source”.
M preserved notational characteristics of Scarlatti which P smoothed out, such as the cancellation of a key signature by omission (Scarlatti) instead of by naturals (scribe P). There is no reason for M to have employed the same procedure twice in different contexts:

Identification of manuscripts by copying year.
Ralph Kirkpatrick subtly downplayed the value of the Parma-set against that of Venezia by suppressing the Parma-dates because several of them are anterior to their Venezia-counterparts. All fifteen Parma-volumes except the first one have volume numbers and are dated. The explicit volume-count begins on the title page of vol. 2. Volumes 2-7 have copying dates in the index, vols. 8-15 on the title page and in the index. The first Parma-volume is undated, but since vols. 2-5 were all copied in 1752, the largest number of volumes of either Parma or Venezia to be copied in one year, 1751 can be tentatively adopted as copying year for Parma-I. In October 1751 two new scribes had been hired. To indicate the ascending order of the multi-volume years 1752, 1753, 1754, 1756 I have added letters: Parma I = P51, II = P52a, III = P52b, IV = P52c, V = P52d, VI = P53a, VII = P53b, VIII = P53c, IX = P54a, X = P54b, XI = P54c, XII = P55, XIII = P56a, XIV = P56b, XV = P57. The year dates which Kirkpatrick assigned to the Venezia-volumes past V42 and V49 (which do not belong to the series of “Collected Works”) I have adjusted accordingly: Venezia I = V52a, II = V52b, III = V53a, IV = V53b, V = V53c, VI = V53d, VII = V54a, VIII = V54b, IX = V54c, X = V55, XI = V56a, XII = V56b, XIII = V57.
Terminology.
“Toc[c]ata” occurs in Z, M5 and P1, “Sonata” as early as Boivin Choisies (1737), the Essercizi (1738) and the main collections M, P, V, Z, Ca. Since Scarlatti himself used “sonata” as early as K347 (P54a:20), I have adopted it. The designations “compagn[a/e]” and its components “prim[a/e]” and “secund[a/e] I derived from P53a:13: “Ante de esta Sonata se debe Tañer la que sigue, que es Compañera, y 1.a deestas.”

Pairing: reception history.
Besides the actual pairings of sonatas as early as V49, the earliest extra-textual proof that the copyists were aware that sonatas were to be paired occurs in P53a. The Spanish scribe had paired P53a:13 in D, ¢ Presto, ámbito 1A-b2 (K53)[2] and P53a:14, a 3/4 Andante in D, ámbito 1A-d3 (K258). He mis-paired two singletons, and, after having done so, noticed that he had copied the fast compagna before the slow one. He corrected himself by noting over the beginning of P53a:13 the above. The scribe of P had no musical understanding of why sonatas were paired, only the formal understanding that pairs were in the same key, that duple time often preceded triple time, and that slower preceded faster (the exception to this rule were minuets and fugues, which always occur in end position). In 1757 P repeated the earlier mistake duple/triple, slow/fast with P57:4 (K517) in d, ¢ Prestissimo, and P57:3 in d (K516), 3/8 Allegretto. Above the beginning of P57:3 he added: “La que sigue se debe tañer primero”:


When copying into V, P reverted to the cforrect order.
That Scarlatti intended pairing is evident from the Italian comment at the penultimate measure of P54a:20 (K347): “Al Cader dell’ ultimo termino di questa Sonata, atacca subbito la Seguente, Come avisa la Mano.” P copied the instruction directly from Scarlatti’s autograph, otherwise he would have used Spanish. The hand points at the end of the penultimate measure, indicating that the final measure with the chord G-g1-g2 should be skipped after the repeat and the player launch directly into the first measure of the following sonata, which repeats the hand before the first measure. V54a:22 repeats the same instructions, M3:2 only depicts the two hands:

However, the hand points to the wrong seconda, K348:

The unresolved f♯2 proves that K348 is a false marriage that was created at some point during the archived state of the sonatas, and before M, P, Z copied it. The only other sonata in g/G into which the penultimate chord of K347 can properly resolve is K121 in g, a singleton in all sources, which also has the proper ámbito:

K121 picks up the triplet motif from K347 and saunters downwards not in scale steps but in thirds, and in 3/8 instead of 12/8:

K348, in turn, originally was the secunda to K240 (see below). Thus, as early as 1751, scribes were familiar with the formal concept of pairing, but not the musical details. During their archived state many pairs survived intact, especially in the upper K-numbers, but just as many had been disturbed during the years of being archived. In other words: after the sonatas had been archived, someone – likely María Bárbara – revisited them and returned them in the wrong order.
In 1933, the notion of pairings was revisited by Walther Gerstenberg:
„Ein Teil der handschriftlichen Quellen […] stellt die Sonaten in auffallender Weise zusammen: es folgen hier in der Regel zwei Werke aufeinander, die sich in ihrer Taktart wie Tanz zu Nachtanz verhalten und die gleiche oder die variante Tonart aufweisen.[7] Ob eine solche Ordnung, die die Sonaten paarweis zusammenfaßt, vom Komponisten selbst beabsichtigt oder ob sie nur eine ad hoc getroffene Kopisten Maßnahme ist, die der Übersichtlichkeit dient, bleibt offen.”[8]
Gerstenberg acknowledged the preferred sequence duple/triple and the common tonality passim but did not elaborate, perhaps because he was the first to assume that the pairing could have originated with copyists.
In 1953, Ralph Kirkpatrick moved the pairing of sonatas into the lime light of his Scarlatti monograph: “[…] the pairwise arrangement is so consistent in the Venice, Parma, and Münster manuscripts as to make it absolutely clear that it was intentional.”[9] However, his only proof were the scribal evidences mentioned above, to which he added the inconclusive “Volti subito” that occurs in V49[10] between K99 (V49:2) and K100 (V49:3Alle,mo). Unlike the other “Volti” in V49 written in bright red ink which indicate the page turning between first and second half, this “Volti subito” is sketched in very faded black ink and was never reddened. It may have been a mistake by the scribe who missed that he had arrived at the end of K99.
Kirkpatrick found further proof for Scarlatti’s pairings in two-movement keyboard sonatas by Alberti, Durante, and Paradies.[11] “The relationship between the sonatas of a pair is either one of contrast or compliment. The sonatas that bear a complementary relationship to eachother may share a certain overall unity of style or of instrumental character or they may be composed in the same harmonic color. For example, Sonatas 106 and 107, although in F major, both hover around F minor and its related tonalities.)”[12] First, K106 and K107 are a false pair, and Kirkpatrick’s analysis is vague and unsubstantial. So is the following: “In the contrasting pairs, a slow movement may be followed by a fast (Sonatas 544 and 545); a simple movement, generally slow, may serve as an introduction to a more elaborate (Sonatas 208 and 209); or an elaborate and concentrated movement may be followed by a simpler and lighter movement, for example a Minuet, which serves as a kind of Nachtanz (Sonatas 470 and 471).”[13] He does not explain or specify the following: “There is evidence that some sonatas might have been arranged in pairs or rearranged at some date posterior to their composition, but by and large the pairwise arrangement predominates and must be accepted as a requisite to any intelligent and adequate approach to the Scarlatti sonatas.”[14] He noticed the identy of the tonic: “One [sonata] may be in minor and the other in major, but both members of a pair always have the same tonic.” [15] He pointed out the complimentary ranges of the instrument: “Frequently the members of a pair demand roughly the same keyboard range […].”[16] Kirkpatrick sought in particular to redress the sonata-suites arranged by Alessandro Longo. [17] However, besides intuitive vagaries, Kirkpatrick never delivered one actual musical proof, although there is plenty to be found. Had he elaborated more on the musical reasons for pairing, many pairs would not continue to be performed as singletons, or mismatched. Despite his emphasis on the pairings, Kirkpatrick was so beholden to the Royal burgundy morrocco of the 15 Venezia volumes that in his reckoning of the sonatas, which was supposed to replace that of Alessandro Longo, he separated K126•129 in c, K127•130 in A♭ (he structurally only analysed K127) and K128•131 in b♭ because they appear in that sequence in V49. K126•129 belong together thematically and remained intact in Z3, which K did not know. The pair in A♭ remained intact as P52a:21•22 and Z3:4•5, likewise the pair in b♭ as P52a:29•30 and Z3:6•7. In M the pair in A♭ became dispersed (M4:36•3:16), and of the b♭ in M only K128 survives. Noteworthy again is the distance two partners could drift apart: a whole volume separates the pair in c in P52a:26•51:29. In the case of P, “leftovers” repeatedly gathered at the end of sequential volumes. A similar case is the pair in e, K198*•98*, P52c:20•52b:19 (see below).
In 1957 Hermann Keller took the erroneous composition date 1753 as reason that Scarlatti would not have composed singletons as contained in V42 and the Essercizi, only to switch to pairs after 1753.[18]
In 1963 William Newman picked up Kirkpatrick’s pairing idea but suggested that the similar beginnings of K307•308 and the group 490•491•492 did not suffice to establish pairings with certainty. He observed that in “well over half the two-movement groupings the typical association of a duple and a triple-metered movement obtains”. Since no one knows about Scarlatti’s sonata-pairs for Easter and for Christmas (more below) he made the case for K170 to actually consist of “2 separate movements no different in relationship or extent from those in the paired sonatas” (Newman, p. 267). K170 forms a pair with K174 (see below).
In 1967, Pestelli[19] rejected the concept of pairing because there were single sonatas between paired ones which worked against his invented chronology. Like Kirkpatrick Pestelli was obsessed with the musically secondary aspect of chronology and sacrificed the structure of the sonatas to his unfounded preconceived notion of a chronology.
Sheveloff’s reaction to the notion of pairings was patronizing. In his dissertation of 1970 (Z was unknown to him) Sheveloff reacted with four rethorical questions:
Are the groupings really a scribal convenience after all? Were the sonatas conceived separately and later joined in pairs, even tryptichs? Were the earlier scribes confused? Is the pairing an arbitrary matter left to the scribe or even the performer like so many other features of eighteenth-century performance practice?[20]
Sheveloff countered Kirkpatrick’s and Newton’s concept of pairing[21] with another question:
How are we, on the basis of such all-encompassing musical possibilities for the relationship of a pair, to test this “true meaning”? It would not be difficult, almost at will, to yoke together two sonatas in the same key, but from different places in the sources, and find many kinds of “musical justifications” for this pair at least as good as the ones suggested by Kirkpatrick and Newman.[22]
There exists undeniable musical justification why sonatas belong together, but Kirkpatrick and Sheveloff were ignorant of them.
Boyd acknowledged the high incidence of pairing, the similar compass of some pairs, mentions the scribal annotations quoted above, but left the pairwise arrangement as “an option for the player” (Boyd, p. 166). Like everyone before him he was incapable of finding any musical connection between pairs: “Attempts to trace thematic connections between paired sonatas have not been very convincing, but it is possible to sense some kind of unity at a more subliminal level” (166). He recognized similarities between a few non-paired sonatas, elaborated on those between K528 and 529, but summarized: “One is led to the conclusion that even if the pairing was not part of the original conception it was nevertheless done creatively when the works were brought to their final form.” The meaning of his conclusion is unclear.
Some pairing principles: by key, by tempi, by musical themes, by topic.
The seven sets A♭, b♭, B, c♯, F♯, f♯ constitute pairs by key and by related themes and motifs: K127•130, K128•131, K244•245, K246•247, K261•262, K318•319, K447•448.
K126•129 are thematically and motivically linked. Both vary the same descent of trills e♭-d-c-b♭-a♭-g rhythmically over the same bass (K126) and tenor (K129), c-b♭-a♭-g-f:

K232•233 are united by the same 4/5 albeit rhythmically and figuratively altered crossrhythms and syncopations, which are unique to this pair:

K246•247 are linked by their halved and mirror-inverted themes a rovescio. The first theme of K246 is mirrored in the first theme of 247. K246 first theme g♯2 f♯2 | e2 d♯2 c♯2 b♯1 c♯2 g♯1 c♯2 d♯2| e2 d♯2, then imitation an octave below mm. 3-5 → K247: c♯2 g♯2 e2 | d♯2 c♯2 b♯1 c♯2 d♯2 | e2 c♯2 g♯1:

K318•319 are a pair not only because they are the only sonatas in F♯, but because they proceed in opposite motion and with rhythmic alterations: K318 mm. 1-4 descending scale SAT a♯2-f♯1 with imitation → K319 ascending scale TAS f♯1– a♯2 with imitation mm. 1-5:

Other characteristics: when using the same theme in the seconda, Scarlatti always modifies it rhythmically. Often paired sonatas will begin in opposite motion, i. e. one begins with a descending SA, the with an ascending BT. Between sonatas a voice may reappear in a different register in the other. Pairs in major/minor prefigure respective tonal excursions in eachother. […].
Thematic sonata-pairs: Christmas, Easter, Semana Santa.
Alessandro Longo (1864–1945) was the first to identify the siciliano of the sonata in C, his LS 3 (1910), Kirkpatrick’s K513 (1953) as a Neapolitan Christmas pastorale:
L’episodio centrale di questa composizione è identico a una Pastorale popolarissima che si vuol cantare a Napoli e in parecchie contrade del mezzogiorno d’Italia nel novenario di Natale. Si tratta di una composizione originale di Scarlatti, venuta man mano popolarizzandosi o d’una melodia popolare intercalata da Scarlatti nella sua composizione? Io inclino per la secunda ipotesi. Ma lascio all’acume e alla pazienza di qualque studioso riceratore la resoluzione esauriente dell’artistico quesito.[23]
The sonata in C (K513) is divided into three sections: the ”Pastorale” whose first 17 1/2 measures are designated “Moderato” is in 12/8. The tempo changes mid-measure to “Molto allegro” for the remaining 18 1/2 measures of the first half. The second half begins with a different theme in 3/8, ”Presto” which ends the sonata in m. 81. This seeming disjointedness of both halves led to the characterization of K513 as
“another example of a sonata with a totally irrelevant ‘C’ section (Presto, 3/8) […] with the result that the two halves give the impression of belonging to two completely different works. This juxtaposing of unrelated material is by no means confined to pastorales, and K170, 227 and 333 are other examples of sonatas in which the two halves are totally contrasted in style and material. Their curious structure seems to be unparalleled in the sonatas of other composers.”[24]
Such a judgement is only possible if one does not know that the seeming singleton K513 is the second of a pair of Natale beginning with K485, which, in turn, was mis-archived with K486, 487. Of all sonatas in C only K485 prefigures motifs, modulations and playing figures which anticipate and mirror those of K513. Both share the descending/ascending “shooting star” scales in 32nds, K485 Soprano-Alto mm. 25-28, 50-53 → K513 Tenor-Bass mm. 13-15. The broken chords ending K485 reappear triumphantly in the Presto of K513. The final section of K513 is no longer ”totally irrelevant”, but rounds off the Christmas-celebration with a joyous ”Kehraus”. K485 is in duple time but triplets dominate the piece. All Christmas pairs reference bells, depict human rue and anguish and longing for redemption either by extended minore sections and rhythmic displacement. The runs of 32nds in K485 towards the upper limit of the keyboard reflect the desire for redemption, which not are “grounded” until K513. The siciliano is always reserved for the second sonata of the pair:


K485 descending g3-g2, f3-g2, e3-g2, repeated → K513 ascending b1-c2-d2, repeated | broken c-octaves:

There are no other sonatas in C who share these features, and these musical topoi repeat in all other Natale by Scarlatti. While all Christian symbolism has been explored in Bach’s religious cantatas, there has been no such approach granted to Scarlatti’s sonatas. K485 m. 49 the first two beats end the cries for redemption of the “penitent soul”, the turn to C on the third beat and D7 turn into the hopeful gestures of the descending scales in G (first half). In K513 the wish for redemption has been fulfilled, and is expressed by the runs from the soprano being transferred into the tenor. Other Christmas secunde are not always called pastorales, like K202 in B♭, K204a in f|F, K214 in D, K235 in G, K273 in B♭, K415 in D, K446 in F, to name a few. Every sonata which breaks into a siciliano is a Christmas secunda. Their hallmark is 6/8 or 12/8 and the siciliano rhythm, and a valedictory procession before the beginning of the celebration. All Christmas pairs depict similar elements: bells, anguished cries of penitence in minor keys or by rhythmic displacement, the plea for divine redemption by reaching into the upper register, cf. the three d3 in K259, a pastoral celebration of Christ’s birth, the players of the siciliano departing, and a final joyous Kehraus. Melodies and harmonies of prime and secunde are always related, i. e. the harmonic shifts of the sicilianos are always prefigured in the prime, as in K189 and K184, and the Kehraus figures, often broken octaves, are always prefigured in the secunde. K202 is preceded by K189 in B♭, and is similar in structure to K513. Where K189 begins with three repeated f2, K202 answers with three repeated b♭2. The number three, alluding to the trinity, plays a central role in all Christmas compagne.
This Christmas symbolism can be found in other sonata-pairs. The anonymous composition by the copyist of Cary (ff. 156v-158r) contains two compagne di Natale : an “Andantino Para la Pastoral” in 3/4 and a “Pastoral. Allo” in 6/8. Here too the three repeated d1 and a2 imitate bells as do the d in bass and soprano of the siciliano in 6/8:

Like Scarlatti, thirds and broken octaves depict “completion”, and the jaunty descent from d1 through D through three octaves and in three mm., in reply to the prayer of the rising broken chords of the Andante, against the repeated bells of the high d2, depict the manifested trinity. The composer maintained the dotted 6/8 through the end. The rhythms of the repeated bass notes through the final eight mm. suggest a marching band and drum rolls disappearing into the distance:

There are at least eight compagne di natale by Scarlatti. Many of them were disunited during their archived state: K189•202, K213•214, K259•235, K331•273, K414•415, K462•446, K485•513. Here are K259•235:
K259 and 260 were mismatched (both are in 3/4), and K260 is the prima to K241. Their first theme g e c …, four mm. in K259, eight in K235, restated in both; […]. mm. 9-16, reiterate at the beginning of the second half, mm. 39-47 depict the discordant soul by their displaced accents on the second and third beats. The plea for redemption, the “drawing down” occurs at mm. 23-26 and repeats, second half mm. 54-57, especially with the three repeated d2 in m. 55. Both halves conclude with “heaven-climbing” ascendant intervals in D and in G. In K235 the melody g-e-c-b | d-e-a-g, with appoggiated e and c, unfolds bell-like on the first beat of the first eight mm. In K259 g-e-c-b also fall on the first beat, e and c also appoggiated, but they have no footing because the rhythmic accents fall on the second beat in mm. 1-3, on the third beat in m. 4. Where Bach depicts the lost soul in Cantata 105 by leaving the beautiful aria “Ihr zitternden Gedanken” without a bass, Scarlatti depicts the rueful discordant soul by displaced rhythmic accents, often in sixths, and with dissonances. In the yet “unredeemed” K259 the intervals d-e and a-g are rhythmically displaced. The tonalities of K259 and K235 are the same:

In K259 the anguished soul is depicted by excursions through mostly minor tonalities, with unisons drifting apart to octaves, and displaced rhythmic accents, in the first half first through e and F♯, in the second half through d and g. K259, first progression through e, mm. 9-12, shifting off-beat accents highlighted. The dissonant f♮ (original key of G) announces that sth. is amiss:

Scarlatti integrates most of the minor keys of his prime di Natale in the harmonic progressions of the modulations of the pastorale in the seconda. Thus the twelve mm. 77-89 of the pastorale of K235 – the number twelve reflecting the twelve days – pass through e, d, and g, as in mm. 77-89 (M):

Every prima di Natale depicts the hope for redemption by ascending to the highest note, here d3 in m. 55 of K259:

Ascending broken octaves, followed by a stepwise descent express the wish for redemption:

After the pastorale, they always receive a joyous reply in descent, here K235 mm. 101-102 (M):

Before depicting these celebrations in 3/8, Scarlatti concludes every siciliano with the gradual departure of the players, clothed in warm major sixths, here the eight mm. 93-101 from K235 (M):


Likewise K189 and K202 form a Christmas-pair (incidentally in P only one number apart: P52c:10•12). Both begin in a single voice, only the 3/8 of K202 ends in a chorus. K189 repeated three f2, dominant in anticipation of the tonic K202 three repeated b♭2 first mm., reiterated at the beginning of the closing section of K202; both first five mm. SA descent b♭-g-e♭, then imitation TB mm. 6-10. K189 tentatively ascends to b♭2-g2-e♭2, c2-a1-f1, the combined subdominant and dominant triads, while in 202 the eighths come joyfully tripping down from heaven on their own, hopeful prayer of the prima answered by the secunda:

The harmonic and rhythmic symbolism is akin to that of the other Natale.
To return to Longo’s discovery: if Scarlatti wrote one Christmas-pair, there must be others in his output because it is improbable that he only wrote for one Christmas, but not for others. If Scarlatti wrote Christmas-pairs, it can only be expected that he did likewise for Easter. María-Bárbara, Fernando, and Scarlatti were devout catholics, and Scarlatti contributed to the musical celebration of the highest catholic holidays, Easter and Christmas.
The compagne di Pasqua share similar identifiers to those of the Natale. The Easter-sonatasmove in triple rhythms or triplets and have a triple structure. The core events depicted are the crucifixion, the lament about Christ’s leaving from earth, and his resurrection. The most characteristic part of two Pasque is the beginning of the 2a: three groups of three notes in 6/8 rushing upwards, symbolizing the resurrection, as in K163, K333, here K334 (P54a:2):

K249 is interspersed with a total of nine crucifixion-chords à 3, here mm. 98-100:

The same scene unfolds in K215 in 3×4 measures, likewise with nine crucifixion chords; its secunda is K135. The three lumbering beats receive almost equal stresses, anyone playing a straight 1-2-3 doesn’t know what he doing:

The lament from K249, with upper and lower voices drifting apart:

The longest and most moving Easter lament is found in K282, mm. 63-111, beginning:

[1] P51, f. 59r.
[2] B6 = Boivin print 6, M3 = Münster vol. 3, Wo = Worgan, Ca1 = first section of Cary, Li = Lisboa, Z3 = Zaragoza vol. 3
[3] P53a, fol. [25v].
[4] P57, fol. [5v].
[5] P54a, fol. 41r.
[6] V54a, fol. 44r.
[7] fn. Dent, Auftakt, dazu Kommentar: “Die meisten hierher gehörigen Bände prägen eine solche Tendenz klar aus. S. auch in der Notenbeilage die ‘Paare’ Son. I-II und Son. III-IV, deren Zusammenstellung den Handschriften folgt.” Meant are K452-453, und […].
[8] “Some of the the manuscript sources” – Gerstenberg was familiar with M, P, Z – “combines the sonatas in a c onspicuous manner: in these instances two works usually follow eachother whose time signatures are related like a dance to an after-dance, and which share the same tonality, whether major or minor. Whether such an order, which pairs the sonatas, was intended by the composer himself, or whether it was only an arbitrary decision by the copyists for the purpose of clarity, remains open.” Gerstenberg, p. 99.
[9] In this context, Kirkpatrick points out the coupling of two movements in works by Alberti, Durante, Paradies. Kirkpatrick, p. 141.
[10] Kirkpatrick, p. 142. V49, fol. 5v.
[11] Kirkpatrick, p. 141.
[12] Kirkpatrick, p. 143.
[13] Kirkpatrick, p. 143.
[14] Kirkpatrick, p. 143.
[15] Kirkpatrick, p. 142.
[16] Kirkpatrick, pp. 141, 142.
[17] Kirkpatrick, p. 143.
[18] Keller, p. 34.
[19] Pestelli, p. 96.
[20] Sheveloff, pp. 316-317; he refers to Newman, p. 267, fn. 49.
[21] Kirkpatrick, p. 143.
[22] Sheveloff 1970, p. 317.
[23] Longo 1972, p. 96. Longo’s note identifying LS 3 as a pastorale is not yet present in his final, supplemental volume of his Scarlatti-edition of 1910, thus it either first appeared in his Domenico Scarlatti e la sua figura nella storia della musica, Napoli: Casa Editrice E. Bideri, 1913; or in his D. Scarlatti: Indice tematico (in ordine di tonalità e di ritmo) delle sonate per clavicembalo, Milan: G. Ricordi, 1937. Kirkpatrick and Boyd embellished Longo’s statement without providing any source: “the bagpipes of the zampognari” (Kirkpatrick, p. 129); “the Southern Italian zampognari with their droning basses and their lilting Christmas tunes, or the flutes of the pifferari […]” (Kirkpatrick, 203); “[…] drones and parallel movements in 3rds, in imitation of the pifferari – the Abruzzi peasant musicians who played their shawms and bagpipes in the streets of Italian cities at Christmastide.“ (Boyd, p. 172, also p. 288, fnn. 29, 30). Neither references Longo, nor states whether he actually witnessed such processions.
[24] Boyd 1986, p. 173. However, “K513 has a curious parallel in Bach’s Pastorale for organ BWV 590 […] which also breaks off the ‘Christmas’ movement prematurely (in this case in the mediant minor key) and never returns to it.” Boyd 1986, p. 288, fn. 30. BWV 590 does return, but Boyd was ignorant of the three following sections.
A note on the Vienna Manuscripts. Those copied from Münster (as Kirkpatrick and Sheveloff already pointed out) are irrelevant, although Fadini treated them as independent sources. A textual comparision of the others shows: 15112 and 15126: copied from RC | 15113: copied from Witvogel | 11432: copied from 15112, 15114, 15115, 15116, 15118, 15126, Haffner | 15117 copied from RC and […] | 15119 copied from WG:40-44, Johnson 1752:8, Johnson 1754:1, 3, 5, 6 | 15120 copied from Johnson 1754 (nos. 4, 3, 5). These have no source value. The only four WQ fascicles with source value are WQ15114, 15115, 15116, 15118 since they are copies of the 42 pieces shown by L’Augier to Burney in September 1772; K446, a Christmas pastorale, appears both as WQ15114:12 and WQ15118:8, which gives a false total of 43. In WQ15118:8 the superfluous no. 43, lacks a note on the third beat in m. 33, which is present in WQ15114:12. Thirteen items in WQ15116 retain their original L’Augier-numbers: 24, 28, 29, 30, 31, 32, 34, 36, 37, 38, 39, 40, 42. According to Burney, L’Augier had not asked for pairs, but for pieces with a national flavour, without handcrossings, and of recent vintage, i. e. not available in print. Thus either Scarlatti, more likely a family member, or a friend – perhaps the scribe of Ayerbe or Albéro – in 1754 assembled the desired pieces. Of some “national” pieces like the tarantella K54 the handcrossings were eliminated. Some authentic pairs were included, which allows to fill some of the gaps in the count of WQ15116. Mss. WQ15114-15118 are unified by their individual inscriptions „al Barone DuBeine” = Joseph du Beine-Malchamps, 1717-1803 who received the volumes through L’Augier. WQ15117 was added, since all but one of its twenty-two pieces are derived from printed editions. The four DuBeine-mss. WQ15114, 15115, 15116, 15118 contain music which could not have been copied from any prints available by the time of Burney’s visit with L’Augier. The exceptions are K96 in D (WQ15116:8), an earlier version with a ceiling of c3 is B38c:5, K112 in B♭ (WQ15115:4) which had been printed in B51 (probably also with a reduced ceiling of c3) as well as in Owen 5 (1771, Sheveloff, p. 146), K116 in c (WQ15116:7), which had been printed by Johnson in 1752 (Sheveloff, p. 141), K115 in c (WQ15115:6) printed in Owen 5 (Sheveloff, p. 147), the first compagna of K127•130, Scarlatti’s only set in A♭ (WQ15116:11) which had been printed in 1754 as no. 3 in Haffner’s first „Raccolta”, K115 in c (WQ15115:6), printed in Owen 5 (Sheveloff, p. 147). K54, 56, 96, 112, 115, 116, 119 were also contained in John Worgan’s manuscript, K96 and K112 with the original ceiling of d3. If we discount Burney’s familiarity with the Owen print because he was travelling in Europe at the time of its publication, as well as familiarity with the correct print of Boivin 51 of which only one copy came to light in 2017, and preclude familiarity with Worgan’s manuscript at least at the time of writing the Musical Tours, the „three or four” compositions from L’Augier’s manuscript with which Burney was already familiar were K112, K116 and K127. WQ15116 contains 13 out of L’Augier’s 42 numbered Sonatas, WQ15116: „1765” before no. 42 = „1756”; „1752” = „1753”:

Authentic sonata-pairs (compagne), in ascending order from G/g to F♯/f♯.
The list is not complete; some of the notes are rudimentary.
Instead of RISM, which can be misleading, my sigla: Ay = Ayerbe, B = Boivin, Bo = Bologna, Ca = Cary, CF = Cambridge-Fitzwilliam, E = Essercizi, M = Münster, Na = Napoli, NH = New Haven, P = Parma; PdC = Pièces de Clavecin, RC = Roseingrave, Wo = Worgan, V = Venezia, WQ15114, 15115, 15116, 15118 = the four L’Augier-volumes, Z = Zaragoza. Proven secondary sources, such as the Vienna copies of Münster, are not listed.
Superscripted in italics is the actual, not an assumed ámbito which I have checked for each sonata. Sheveloff’s lists (1970) contains many errors. * indicates handcrossings. Tempo deviations, and all external markings are likewise added in superscript: “R.na” occurs only in Z, “Scarlatti” only in M4 and M5 where it indicates the first of a pair, “1754 in Aranjuez” also only in M4 and M5 which indicates the end of a pair and the copying year and location. “L’Augier” refers to the set of 42 sonatas purchased by L’Augier in 1755. An → before a source indicates that it was copied from the preceding source.
.
G/g:
Authentic pairs (incomplete list): K152•153, K347•121, K169•171, K179•373, K234•196, K259•235 (Natale), K240•348, K260•241, K324•325, K328•283, K304•284, K374•375, K390•391, K424•425, K426•427, K449•450, K454•455, K470•471, K476•477, K493•494, K520•521, K522•523, K538•539, K546•547, […].
🐈⬛ Compagne g: ¢ Moderato e cantabileD-d3 • 3/8 Allegrissimo1G-d3
Sources: M3:2•~/~•Z4:7/P54a:20•52b:8 → V54a:22•~/~•Wo:35/NH:13•2/~•V49:25|K347•121.
Notes: P mis-paired K121 with another fast secunda in g, K43 in 12/8. P54a:20 last measure: “Al Cader dell’ ultimo termino di questa Sonata, atacca subbito la Seguente, Come avisa la Mano.” originally referred to K121. The Italian indicates that P, who annotated P53a:15•14 in Spanish, copied Scarlatti’s original instructions:

In order to link from the penultimate m. of K347 to a secunda, the voices need to resolve properly. They do not with the beginning of K348, which is the secunda to K240 (see K240•348) because the soprano f♯2 remains unresolved (Gilbert):

Scarlatti’s only other sonata in g/G into which the penultimate chord of K347 resolves properly is K121 in g, a singleton in most sources (P):

K121 elaborates on numerous details of K347. It is not a matter of Scarlatti accidentally repeating similar themes or figures in two different sonatas, but one of harmonically, rhythmically and melodically developping “material” first introduced in K347. K121 continues the triplets from K347 in 12/8, and saunters downwards not in scale steps but in thirds:

Playing figures mirrored in K347 and K121 are the inverted runs in 32nds, ascending BTAS and chromatic in K347, descending SATB in K121:

In K121 Scarlatti alters the rhythm of the 3/8 triplets of K347 by changing the first eighth note into two 16ths. These “stumblings” on the first beat, combined with the appoggiature, are difficult to articulate if K121 is played to fast:

🐈⬛ Compagne G: ¢ Allegro1Bb-d3 • 3/4 Prestissimo1B-d3
Sources: M2:21•3:3/Z2:36•~/Z5:21•~/P52d:23•54a:21→V53b:5•54a:23|K240•348.
Notes: After the complex and deeply moving harmonic excursions of K240, K348 is but a brief resume of the major themes of K240, often quoting the prima directly, and following the simple harmonic scheme of it without any excursions. Both compagne begin with a trill and move in opposite directions: K240 descending SA, K348 ascending BT, both with instant imitations:

K348 quotes K240:

K240 m. 45 is characteristic of Scarlatti’s melodic orthography in the juxtapopsition of sharps in the SA and flats in the TB. Similar juxtapositions in voice-led dictated accidentals can be found in Chopin; modern editors usually regulate them. The stepwise melodic descent of the soprano in K240 dictates the g♯2 (Z, mm. 44-46):

K240 second theme B7/E reiterated in K348:

K240, next to K260, has some of the densest and most moving harmonic modulations in all of Scarlatti. K348, as a true “Nachtanz”, mostly limits itself to a joyous banter between G, D, A, E, f♯. The hand of K347 originally pointed to K121 (see K347•121), while the hand at the beginning of K348 dictates the continuation from K240 to K348. – K240 fermata A m. 22, followed by second theme; K240 fermata D, new key signature b. 35 ff. (♮), new ondulating melody; kaleidoscopic modulations; proportions; K240 m. 42 fermata A♭; mm. 43-45 l. h. four quarter-chords a♭-e♭-g♭, in b. 45 followed by an a♮ quarter note, m. 45 descending scale a♮ g♯-f♯-e♮-c♯-h♯ of c♯, over e♭7, followed by a fermata on the key of C♯; […].
🐈⬛ Compagne G: ¢ Andante cantabileG-d3 • 3/8 Allegro1B-d3 (Rondo).
Sources: ~•M5:8/P53c:3•53b:13 → V53d:9•53c:19|K304•284.
Notes: In P (→ V), K304 is mismatched with K305, K284 with K283. The range of K305, 1G-d3 does not compliment G-d3 of K304. Scarlatti did not pair any sonatas in any key a bass-octave apart. Of all sonatas in G/g, only K304 and K284 compliment eachother thematically and figuratively: the gentle first theme of K304 is melodically and rhythmically varied in rondo form in K284, where it also undergoes more harmonic changes; the melodic upbeat of K304 (d2 → g2) shifts to a downbeat in K284:

K304 m. 25. V misplaced the bar-lines which are correct in P. Gilbert and Fadini, in their musically unfounded preference of V, created an extra m. out of V’s copying error which Scarlatti never wrote:

The a of m. 26 makes it clear that upon repeat the half note G of m. 1 has to be raised by an octave to a half note g instead, just as at the beginning of the second half. K304, P (→ V), m. 52, concludes with a quarter note octave G-g without the necessary pauses. Gilbert completed the m. with rests, Fadini reproduced it incomplete. M. 25 suggests that m. 52 originally contained a bridge parallel to that of the first half which the first time would have led back to m. 26, the second time would have been skipped to lead directly into m. 1 of K284. Since the original pairs were separated, such a bridge at the end of K304 would have ended with a perpetuum-mobile cadence without returning to the tonic, which is why P amputated it:

Structure: K304 first half (mm. 1-25) → K284 first half (mm. 1-32) before entry of the minore; K304 second half (mm. 27-52) → re-entry of G in K284 (mm. 65-120); K284 returns to g a second time mm. 121-152, and returns to G mm. 153-183. The lilting beginning of the coda to the Rondo, mm. 161-168, gently swaying between G and D, is so empfindsam it could have been written by J. Chr. Bach. It is also operatic, depicting dancers leaving the stage. To properly accentuate the off-beat 16th triplets on the third and second beats, the piece should be not played faster than dotted quarter at single beat M = 46:

🐈⬛ Compagne G: 3/4 Andante spiritoso1G-g3 • ¢ Allegro1G-g3
Sources: M2:47•48/P56a:1•2 → V56a:1•2|K454•455.
Notes: The repeated notes at expanding intervals on the second and third beats in the second half of K454 serve as the main theme of K455 shifted to the first beat; similar ostinato endings in different figurations:


A♭:
🐈⬛ Compagne A♭: ¢ Allegro1Bb-d3 • 3/8 Allegro1Ab-c3
Sources: M4:36Scarlatti•3:16/Z3:4•5/P52a:21•22/V49:31•34/ CF13:14•11/~•Li:38/WQ15116:391752•~/Ha:3•~|K127•130.
A/a:
Authentic pairs (list incomplete): K39•62, K109•54, K113•114, K217•175, K181•182, K300•301, K320•321, K322•323, K343•344, K368•369, K428•429, K452•453, K456•457, K499•500, K532•533, K536•537, […].
B♭:
Authentic pairs (list incomplete): K57•47, K154•155, K189•202 (Natale), K331•273 (Natale), K332•334 (Pasqua), K528•529, K544•545, K550•551, […].
b♭:
Authentic pair: K128•131.
B:
Authentic pairs: K244•245, K261•262.
🐈⬛ Compagne B: 3/8 AllegroC♯-c♯3 • 6/8 AllegroC♯-c♯3
Sources: M2:17•~/P52d:27•28 → V53b:9•10|K244•245.
Notes: Two-manual mm.: 10-11 d♯, a♯. M2:18 missing. Broken chords off-/on-beat, which add a stagger to K244; followed in M and P (M missing one compagna in each pair) by K246•247 in c♯; the four may have been composed and performed together; […].
🐈⬛ Compagne B: 2/4 Allegro1B-c♯3 • 12/8 Vivo1B-d3
Sources: M4:49Scarlatti•3:6/P53a:17•18 → V53b:26•27|K261•262.
Notes: repeated notes of the chords of the prima reiterated in the secunda; […].
b:
Authentic pairs: K197•293, K173•227, K376•377, K408•409, K497•498.
🐈⬛ Compagne b: c AndanteC♯-d3 • ¢ AllegroF♯-d3
Sources: M4:46Scarlatti•~/Z4:35•~/P52c:9•53b:23 → V52b:26•53c:28|K197•293.
Notes: Common ámbito C-d3; theme; singletons in M, P, Z. Scarlatti’s only pair where the seconda varies the duple time of the prima. K293 “doubles up” and splits the scalewise descending octaves of K197 across two measures, creating a strong second beat in K293:


🐈⬛ Compagne b: 2/4 Allegro1A-d3 • 2/4 Allegro – 3/81B-d3
Sources: M3:9•~/Z4:4•2:51/P51:26—•52d:11 → V52a:26•53a:22|K173•227.
Notes: ámbito; theme; motif of repeated notes leading to six repeated notes at the beginning of 3/8; rhythmic displacement; singletons in all sources. The only pair which continues a time signature from prima to secunda before changing to 3/8.
🐈⬛ Compagne b: 3/4 AllegroD-d3 • 2/4 AllegrissimoE-d3
Sources: M5:3Scarlatti•41754 in Aranjuez/P54b:19•20 → V54b:19•20|K376•377.
Notes: M closes with copying year and location; since M, P, Z copied from autographs, these particular texts must have been in Aranjuez at the time; unity of thematic material in both.
🐈⬛ Compagne b: ¢ Andante1B-d3 • 3/8 Allegro1A-d3
Sources: P54c:21•22 → V54c:21•22|K408•409.
Notes: […].
🐈⬛ Compagne b: ¢ Allegro1A-g3 • 3/4 Allegro1B-d3
Sources: M1:36•37/P56b:14•15 → V56b:14•15|K497•498.
Notes: ámbito 1A-g3; related themes and quotes, rhythmic displacement; descending 7ths f♯2-g1, e2-f♯1, d2-e1, c♯2-d1; descending major sixths g1-e2 ff.; halt on h1-a♯1. 1a mm. 1-4 → quoted 2a mm. 3-5, 9-10; trills a♯-h. The rising broken octaves till g3 in the soprano of the first half of K497 mm. 36-38 transposed to the tenor of the second half of K498 mm. 55-58; […].
C/c:
Authentic pairs (list incomplete): K115•56, K116•139, K126•129, K132•133, K156•157, K158•159, K165•166, K170•174, K199•200, K254•226, K302•303, K356•357, K485•513, K486•487, K501•502, K526•527, K548•549, […]:
🐈⬛ Compagne c: 3/4 Allegro1G-d3, x • 12/8 Allegro con spiritoC-d3, x
Sources: Z2:22•23 All.o Fin/M4:37Scarlatti•~/Z3:51•35All.o/P52b:13•52a:25All.o con spiritu/Wo:23•22Con spritu/V49:19•~/WQ15115:6•15116:14Con spirito 1752/~•V42:14Con spirito|K115•56.
Notes: Preserved as a pair in Z2, part of a triplet in Wo. Harmonies; final ascending/descending broken chords opposite motion. WQ “1752” taken from P.
🐈⬛ Compagne c: 3/8 Allegro1G-d3, x • ¢ PrestoC-d3, x
Sources: M4:38•~/Z3:52•54/~•Z2:4/P52b:14•6/Ay:20•19/Wo:24•27/V49:20•~/Ca1:43•~/WQ15115:341752•~/
~•V52b:13Fin•~/Li:42•~/~•NH:17 /~•Ba:25|K116•139).
Notes: “1752” corrolated with P.
🐈⬛ Compagne c: 3/8 —1G-d3 • 6/8 AllegroC-d3
Sources: M3:17•~/Z3:10•11/P52a:26•51:29/~•Z2:20/V49:30•33/~•V52a:29/Ay:9•~/Ha:2•~|K126•129).
Notes: K126 chain of descending trills e♭-d-c-b♭-a♭-g mm. 9-14 → K129 mm. 13-14; chromatic scales; key of b♭ mm. 88 ff. → 62 ff.; beginnings second half opposite motion G-c; concluding thirds mm. 110 ff. → mm. 82 ff.; K126 ends on 1C-C-♭♮c1, K129 ends on 1C-C-♭♮d1c1. Link: both share, rhythmically altered, the same sequence of trills e♭-d-c-b♭-a♭-g (in K129 redirected via ascending eighths) over the same bass (K126) and tenor (K129), c-b♭-a♭-g-f; rhythmic and tempo proportions 2:1:

c♯:
Authentic pair: K246•247.
🐈⬛ Compagne c♯: ¢ Allegro1B-c♯3 • 3/8 AllegroC♯-c♯3
Sources: M2a:19•~/Z5:33•~/P52d:29•30 → V53b:11•12/WQ15119:5•1|K246•247.
Notes: missing M2a:20 part of a group of four pairs without compagne. K246 (49 mm.) first theme g♯2 f♯2 | e2 d♯2 c♯2 b♯1 c♯2 g♯1 c♯2 d♯2| e2 d♯2, then imitation an octave below mm. 3-5 → K247 (99 mm.): c♯2 g♯2 e2 | d♯2 c♯2 b♯1 c♯2 d♯2 | e2 c♯2 g♯1. Enharmonic change K246 f♯2 → g♭2 in the middle of m. 17 over a held note reminiscent of K318 mm. 54-55 g♭1 → f♯1. K246 especially theme mm. 13-14, 23-25, 44-45, 53-54 of unforgettable beauty, a dream-scape with every measure. K246 needs to be played with a certain hesitation and languor on all appoggiature like these, quarter = M 48, no faster. An understated and slightly prolonged first beat, while the appoggiated octaves “float” around the emphasized second beat, which creates a heady, scooping cross-rhythm of “one–and-two-and”:

Landowska commented on the “moorish fifths” of K247, a secunda rhythmically just as sensitive as the prima. One of Scarlatti’s many rhythmic and harmonic marvels, like K244•245 in B, with which it shares many features. K246•247 are linked by their halved and mirror-inverted themes a rovescio. The first theme of K246 is mirrored in the first theme of 247. K246 first theme g♯2 f♯2 | e2 d♯2 c♯2 b♯1 c♯2 g♯1 c♯2 d♯2| e2 d♯2, then imitation an octave below mm. 3-5 → K247: c♯2 g♯2 e2 | d♯2 c♯2 b♯1 c♯2 d♯2 | e2 c♯2 g♯1:

D/d:
Authentic pairs (list incomplete): K33•53, K160•161, K177•178, K213•214 (Natale), K277•278, K281•282 (Pasqua), K287•288 (organ), K312•313, K389•388, K414•415 (Natale), 434•417, K443•444 (Semana Santa), K478•479, K484•480 (Semana Santa), K491•492 (Semana Santa), K516•517, K552•553, […].
🐈⬛ Compagne D|d-D: ¢ Allegro1A-g3 • 6/8 Allegrissimo1A-d3
Sources: M2:39•40/P55:22•23 → V55:26•27/Ca2:35•36|K443•444.
Notes: Semana Santa, Flamenco. Broken sixths from K443 serve as first theme of K444; proportions 4/4 : 6/8. K444 alternates major/minor and between 6/8 and 3/4:

E♭.
Authentic pairs (list incomplete): K192•193, K252•253, K306•307, K370•371, K474•475, K507•508, […].
E/e:
Authentic pairs: K15•20, K198•98, K162•163 (Pasqua), K134•136, K215•135 (Pasqua), K216•203, K206•207, K232•233, K263•264, K291•292, K380•381 (Semana Santa), K394•395, K402•403, K495•496, K530•531.
🐈⬛ Compagne E: 3/4 Andante commodo1B-g3 • 3/8 Allegro1B-e3
Sources: M4:47Scarlatti•48/NH:15•16/P54b:23•24 → V54b:23•24|K380•381.
Notes: Semana Santa, Flamenco. Harmonically (key of e) and melodically the highest note in m. 55 is g♮3 (Gilbert added a ♮) and not a g♯3. M and P did not add a ♮ either. Scarlatti omitted a ♮ because he knew that the highest note of his instrument was a g3:

To replace g♮3 with an e♮3 changes the melodic line. – K380 f♯2-g♯2-g♯2-a♯2-a♯2-b2 (m. 23) → K381 f♯2-g♯2-a♯2-a♯2-b2 (mm. 41-43); K380 h2-b2-c♯3-c♯3-d♯3-d♯3-e3 (mm. 60-61) → K381 h2-b2-c♯3-d♯3-d♯3-e3 (mm. 110-112); K380 final e3 (mm. 74-76) → K381 final e3 (mm. 122-125, 127-130); harmonies second halves, c♯, g♮; […]. Texting‘s remark “K380 is known among keyboard players as the ‘Cortège'” is vague. Wanda Landowska created that epithet in 1934 and had it even printed on the label of her recording. K380 is not a bolero but – as Landowska intuitively grasped it – depicts a procession, specifically a Semana Santa procession.
F/f.
Authentic pairs (list incomplete): K106•276, K183•187, K184•204a, K185•186, K238•239, K462•446, K466•467, K468•469, K540•541, K542•543, K554•555, […].
🐈⬛ Compagne F: ¢ AllegroC-d3 • 3/8 AllegroC-d3
Sources: M5:43•11/P52b:15•53b:3 → ~•V53c:11/V49:10•~/Wo:3•~/BIV:7a•~|K106•276.
Notes: K106 first theme mm. 1-4 → K276 mm. 1-2, with repeat; K106 second theme descending appoggiature g♯2-a2 | f♯2-g2 | e-f | e through F-C → K276 descending appoggiature mm. 13-20 become main theme; second halves both A♭/D♭, e♭, etc.; as Scarlatti often does, he changes key signatures in one compagna, and only accidentals in the other:

F♯/f♯:
Authentic pairs: K318•319, K447•448.
Scarlatti and historic tempo.
Hand in hand with textual accuracy goes the problem of tempo. Modern ears have become used to an abhorrent speed-blend of non-articulated rhythmic and harmonic changes. When the senses of player and listener alike no longer perceive every last rhythmic change and harmonic modulation which the composer has put into his music, when overtones blur, when ornaments because of the tempo in which they are played disconnect from the melodic line: then the music is being played too fast. The ear should perceive the sudden 16ths on the weak beats of the flamenco K492 as a surprise, as beguiling and seductive. Instead player hammer through the piece at a relentless 6/8 at record speed, and there is no surprise and no beauty left. Each pair of 16ths has to create suspense. If the ear cannot follow the alternating 6/8 and 3/4 of the flamenco K444 and the changing rhythms are perceived only as sudden pauses, K444 is being played too fast. The rhythmic suspense and surprise of these two bars of the Fado K426 has to be palpable each time the pattern occurs:

The same applies to the kaleidoskopic modulations in K426: the ear needs to experience the sudden unexpected chromatic shift to A♭ in m. 15, after the previous conclusion in g and a long suspenseful fermata, as the moment of musical wonder it must have been for the first listeners. When K240, at the conclusion of its second theme in A and after a fermata on D, literally turns around on the key of c and begins a long chain of distant modulations, with its accent shifts, this moment of utter dejection has to be palpable to the listener:

During the first week of September 1772 the musicological traveller Dr. Charles Burney (1726–1814) made the acquaintance of the imperial physician Dr. Alexandre-Louis L’Augier (1719-1774) in Vienna (also spelled „Laugier”, but Burney wrote „L’Augier”; more about L’Augier’s copies of 42 Scarlatti sonatas below). L’Augier impressed Burney with his ethnomusical sensitivities:
“M. L’Augier […] has arrived at great skill in music, has a most refined and distinguishing taste, and has heard national melody in all parts of the world with philosophical ears. […] M. L’Augier sung to me several fragments of Bohemian, Spanish, Portuguese, and Turkish music, in which the peculiar expression depended on the contre tems, or breach of strict time; beat the measure, and keep it as exactly as is necessary, in more refined and modern music, and it wholly loses its effect.” (Burney II, pp. 86, 87).
It is a rare feat to be able to sing (L’Augier) and to hear (Burney) “national melody”. What Burney called contre tem[p]s or “breach of strict time” is not rubato, it is, for lack of a better word, a tightening or slackening in shifting cross-rhythms, a lingering around stressed weak beats, as occur in K232, K240, K246, K259, K260, K394, K426, a precise timing of fermatas, just to quote a few of Scarlatti’s rhythmically and harmonically most refined pieces. To make these moments audible, first the music has to be slowed down from current speeds. Mozart, Dussek, Lanner, Schubert, Chopin would not recognize their music at the speeds at which it is being electrocuted today. The evidence that metronome markings (not until 1816) were read at whole beat and not single beat, i. e. two ticks per indicated note value, not one, although not new, is still being ignored today. Their correct readings, in turn, provide a glimpse that Couperin’s, Rameau’s, Bach’s and Scarlatti’s music from a hundred years earlier was played even slower. The mindless speed-varnish needs to be removed from the playing of Scarlatti’s music.
Scarlatti and Soler.
Soler mentions Scarlatti once In his Llave de la modulación from 1762 [https://archive.org/details/imslp-de-la-modulacion-y-antiguedades-de-la-musica-soler-antonio]. Soler comments on Scarlatti passim concerning the musical double sharp, and he mentions having copied sonatas by Scarlatti (Cary?):
“Yo confiesso haver executado dicha cruz, (sin mas fundamento, que por haverlo visto) assi en algunas Sonatas de Don Domingo Scarlati, como en un Psalmo Dixit Dominus [Soler?, 1754], al verso Juravit Dominus, y en el Psalmo Lauda Jerusalem [Nicola Porpora?, 1745] al verso Quis sustenebit? Confiesso mi mal obrar, porque no se dè la culpa á quien no la tiene; y assi digo, que no se debe tomar por exemplar, porque no es bueno, como queda probado; y si se encuentra en las Obras de Scarlati tal señal, no la tengan por escrita del dicho, sino mia.” (Llave, p. 115).
According to Soler a double-sharp before a note that was already sharped in the key signature, for example a gx within the key signature of f♯, would cumulatively raise the note value not to a but to a♯; hence it was incorrect, and a single sharp would suffice. Since Soler mentioned having copied some of Scarlatti’s sonatas, he likely would have mentioned if Scarlatti had been his teacher: but he did not do so. Soler implies that it was Scarlatti’s practice to not use double sharps, and if any occurred in his, Soler’s, copies of Scarlatti’s sonatas, they were his fault and not Scarlatti’s. In Cary, ff. 11-11v, mm. 37-40, the copyist of K25 avoided the double ♯♯, and used only one ♯, which confirms Scarlatti’s practice and Soler’s own preference.
[…].