WAGENSEIL, Georg. Sonata (_Oeuvres mêlées_). Six
sonatas for the harpsichord (with accompaniment for a
violin).[20] Opera prima. (A. Hummel, London.)

SCHAFFRATH, Christoph.[21] Six sonates, Op. 2
(published by Haffner, Nuremberg, 1754).

MOZART, Leopold. Three sonatas (_Oeuvres mêlées_).

MÜTHEL, Joh. Gottfr. Three sonatas, etc. (Haffner,
Nuremberg, about 1753); three sonatas (autograph).

UMSTATT, Joseph.[22] One sonata (_Oeuvres mêlées_).
Sonata consisting of only a Minuetto, Trio, and Gigue
(Leipzig collection). And the two Italians--

GALUPPI. Sonate per cembalo (London); and

PARADIES, P. Domenico. Twelve sonate di
gravicembalo (London).

GRÉTRY, Belgian composer (1741-1813), wrote "Six
sonates pour le clavecin" (1768), to which, unfortunately,
we have not been able to gain access.

From the two collections, etc., may be gathered many facts of
interest. First, as regards the number and character of movements in a
sonata. Emanuel Bach kept, for the most part, to three: two fast
movements, divided by a slow one.[23] In the second of his Leipzig