Book III. Easy Duets, with change between first and second

positions, by Mazas, Geminiani, Hering, and Ries. (11803 s).

Book IIIA. Easy Duets, with change between first and second positions, by Geminiani, Mazas, C. G. Müller, and Blumenthal. (11803 a).

Alard, and Hering. (11804 s).

Book IVA. Duets up to the third position, by C. Gurlitt. Ignaz Lachner, and Viotti. (11804 a).