Autograph manuscript of counterpoint studies that Beethoven prepared for his pupil Archduke Rudolph, paginated 21-22, with musical and text annotations in Beethoven's hand. As a source, Beethoven used C.P.E. Bach's textbook, Versuch über die wahre Art das Clavier zu spielen (1797). On the back, Beethoven wrote a note to his "Lieben Freunde" regarding errors in his text (see Anderson L.39 for English translation); 1 leaf (2 p.), on 16-stave paper, [Vienna, ca. 1809].