Clavier-Büchlein vor Wilhelm Friedemann Bach : angefangen in Cöthen den 22. Januar Ao. 1720Manuscript.About two-thirds of the book in J.S. Bach's autograph. Cf. Bach-Gesellschaft, Bd. 45.Title on front endpaper.Inscription on flyleaf, signed J. Koetschau.Signature, Wilhelm Friedemann Bach, on back endpaper.Contents include preludes from the Kleine Praeludien, preludes from Das wohltemperierte Klavier, Two-part and Three-part inventions; two incomplete movements by J.C. Richter, a partita by G.H. Stölzel, and a suite attributed to J.P. Telemann.