1. MUS RP 5043 Reference (shelfmark): MUS RP 5043 Title: Scope & Content: CHOPIN, Fryderyk. HUMMELL, Johann Nepomule. Letter from Hummell to Christian Rudolf Wessel concerning Chopin. Sotheby’s, 28 May 1992, Lot 514 Creation dates: 3 Dec 1833 Collection Area: Music Collections Languages: Undetermined Date Range: 28 Sep 1992 Extent: 2 black and white prints