BEETHOVEN Ludwig van (1770-1827). Sonata for the Piano-Forte für das Hammer-Klavier of the Museum's für Klavier-Musik ... 101tes Werk (Wien bei S.A. Steiner und Comp, [1817]); in-4 oblong (25 x 32.5 cm) of [2 ff.]-19 pages, old cardboard. First edition of the 28th Sonata in A major, Op.101, dedicated to Baroness Dorothea Ertmann, née Graumann. Titles and music engraved with S. and C. 2661. Additional title in the Musée Musical des Clavicinistes series. Museum für Klaviermusik. The price is left blank on the title. Publisher's announcement on page [1]. Hoboken 420; Kinsky , p.280]. Bookplates by Siegfried OCHS (1858-1929, composer and director of the Berlin Philharmonic Choir), with a note by his hand on the back cover: "Erster Druck der Sonate"; then Louis KOCH collection . HAYDN Joseph is attached. Die Worte des Erlœsers am Kreuz [Hob. XX/2], (Leipzig, Breitkopf & Härtel, [1801]); large oblong in-4 (27 x 36 cm) of 112 pages, paperback with orange-printed publisher's cover. First edition of the oratorio Th