Note 40 — Chapter II
Henry Edward Krehbiel translation
It is noteworthy, as shown by Nottebohm (“Zweit. Beeth.,” pp. 467, 468) that the first theme of the first movement of the C minor Sonata was originally intended for a third movement in a “second sonata” which (Op. 109 being finished) can only have been the one in C minor. It would seem as if the use of the theme in the first movement did not occur to the composer until after he had conceived the theme of the variations. But the theme had figured twenty years before in a sketchbook used when the Sonata in A major, Op. 30, was in hand. Its key then was F-sharp minor, and it may have been intended for Op. 30.