At one of them symphonies were produced, at the other quartets and quintets.
Great was the speculation in the quartets as to what Mos' Grif had for every one.
Two quartets for flute, violin, viola, and violoncello are known.
Mozart's quartets are few in number compared with the long list of Haydn's.
All these sketches date from 1798 and 1799; but the Quartets were not finished.