330 The references are to Novello’s twelve Books of Bach’s Organ Works, edited by J. F. Bridge and J. Higgs. The edition is complete, and contains every movement included in Alfred Dorffel’s “Thematisohos Verzeichniss” (second edition, 1882) except his No. 24 on p. 72; Nos. 6 and 8 on page 85; the “Kleines harmonisches Labyrinth” (Dörffel, p. 88, tigs. 131-33), the genuineness of which is questioned by Spitta (ii. 43); and figs. 136-37 on p. 88. The Novello edition also follows Rust, against Spitta’s judgment, in printing the “Fantasia con Imitazione” (bk. 12 p. 71) as an Organ instead of as a Clavier piece. Books 15-19 print the Choral Preludes. See the Peters and Novello editions collated in Appendix V. 331 Printed as a “Toccata” in E major in B.G. XV. p. 276. 332 Spitta (ii. 620, 718) mentions a Birthday Cantata written in 1717-1721(?), the title of which is lost. 333 The references are to Peters’ edition. 334 The D minor contains the famous Chaconne. 335 The references are to Peters’ edition. In the B.G. edition the Orchestral music is included in the Chamber Music volumes. 336 Pirro, p. 228, holds that the first two (C major and B minor) were written at Cöthen and the last two (D major and D major) at Leipzig. Schweitzer (i. 402) regards it as not clear in which period the Overtures were written. 337 In A minor, E major, G major. The G major figures as the fourth Brandenburg (bk. 264) and as the Clavier Concerto in F major (bk. 248). The A minor and E major were also converted into Clavier Concerti (G minor and D major) (bks. 249, 251). The D minor Clavier Concerto (bk. 264) preserves a lost Violin Concerto in the same key, and the one in F minor (bk. 250) corresponds with a lost Violin Concerto in G minor (bks. 3068, 3069). 338 Also arranged as a Concerto for two Claviers (C minor) in P. bk. 257b. 339 Bach wrote another Magnificat, the music of which is lost. See Spitta, ii. 374. 340 All except the Sanctus in D major are of doubtful authenticity. See Schweitzer, ii. 328 and Spitta, iii. 41 n. 341 The Concerto in C minor (P. bk. 257) is an arrangement of one for two Violins now lost. The third, also in C minor, is identical with the D minor Concerto for two Violins and is published in that key in the Peters edition. The remaining Concerto, in C major, is the only one originally written for the Clavier. See Schweitzer, i. 413. 342 The work is an amplification of the Prelude and Fugue in A minor, already catalogued among the Clavier works of the Cöthen period. Schweitzer (i. 340) concludes that it was rearranged as an orchestral Concerto early in the thirties, when Bach needed Concertos for the Telemann Society’s Concerts.