Joseph HAYDN (1732-1809). Musical manuscript, Sonate pour le Piano Forte Violon Violoncelle composées Par Mr Joseph Haydn, [Hob. XV:25], [ca. 1795-1800]; 3 oblong in-4 quires of 10-4-3 ff. (covers a little soiled, some slight wetness). This is the famous Piano Trio no. 39, with the Rondo all'Ongarese; composed before 1795, and published in 1796. Manuscript in parts: piano (10 ff) signed "Louise de Groulier" on the cover, Violino concertante (4 ff); Violoncello (3 ff).