24. _Sonata_ for piano and violin, in F major; dedicated to Count Moritz von Fries; published 1801 (originally together with Op. 23). 25. _Serenade_ for flute, violin, and viola, in D major; published 1802. 26. _Sonata_ for piano, in A flat; dedicated to Prince Lichnovsky; composed 1801. 27. _Two Sonatas quasi Fantasia_, for piano, No. 1, in E flat major, dedicated to the Princess Lichtenstein; No. 2, in C sharp minor, dedicated to the Countess Julia Guicciardi; composed 1801 (?). 28. _Sonata_ for piano, in D major; dedicated to M. von Sonnenfels; composed 1801. 29. _Quintet_ for two violins, two violas, and violoncello, in C major; dedicated to Count von Fries; composed 1801. 30. _Three Sonatas_ for piano and violin, in A major, C minor, and G major; dedicated to the Emperor Alexander I. of Russia; composed 1802. 31. _Three Sonatas_ for piano, in G major, D minor, & E flat major; composed 1802 (?). 32. _To Hope_, words from the _Urania_ of Tiedge; published 1805 (first setting; see Op. 94). 33. _Bagatelles_ for piano; composed 1782. 34. _Six Variations_ for piano, in F major, or an original theme; dedicated to the Princess Odescalchy; composed in 1802 (?). 35. _Fifteen Variations with a Fugue_, for piano, on a theme from "Prometheus"; dedicated to Count Maritz Lichnovsky; composed 1802. 36. _Second Symphony_ for orchestra, in D major; dedicated to Prince Lichnovsky; composed 1802. 37. _Third Concerto_ for piano and orchestra, in C minor; dedicated to Prince Louis Ferdinand of Prussia; composed 1800. 38. _Trio_ for piano, clarionet (or violin), and violoncello (from the _Septet_, Op. 20), published 1805. 39. _Two Preludes through all the major and minor keys_, for piano or organ; composed 1789. 40. _Romance_ for violin and orchestra, in G major; composed 1802 (?). 41. _Serenade_ for piano and flute (or violin), in D major; from Opus 5. Published 1803. 42. _Notturno_ for piano and violoncello, in D major (from Op. 8); published 1804. 43. _Ballet_, "The Men of Prometheus"; composed 1800. 44. _Fourteen Variations_ for piano, violin, and violoncello, on an original theme; composed 1802 (?). 45. _Three Marches_ for piano, for four hands, in C major, E flat major, and D major; dedicated to the Princess Esterhazy; composed 1802 (1801?). 46. _Adelaïde_, words by Matthison; composed 1796. 47. _Sonata_ for piano and violin, in A major; dedicated to the violinist, Rudolph Kreutzer; composed 1803. 48. _Six spiritual songs_, by Gellert; published 1803. 49. _Two easy Sonatas_ for piano, in G minor and G major; composed 1802 (?). 50. _Romance_ for violin and orchestra, in F major; composed in 1802 (?).