The Music sale on 23 May has a stand-alone catalogue this time, which contains important autograph music by many of the very greatest figures in Western Music: JS. Bach, Mozart, Beethoven (a sketchleaf for the “Emperor” Concerto), Chopin, Berlioz, Brahms, Wagner, Mahler, Strauss and Pierre Boulez. The J.S. Bach manuscript is wholly autograph, which is very rare at auction these days, comprising the composer’s own arrangement of the trumpet part for his Cantata no.130 (estimate £300,000-400,000). There is also a contemporary manuscript of Bach’s earliest Prelude & Fugue for Organ (c.1702-1703), the autograph of which is lost. The Mahler manuscripts include his greatest song “Ich bin der Welt abhanden gekommen”, regarded by many as the most beautiful orchestral song ever written (£600,000-800,000), together with the hitherto-unrecorded manuscript of “Nun will die Sonn’ so hell aufgeh’n” for voice and piano.