1. MUS RP 4664/4 Reference (shelfmark): MUS RP 4664/4 Title: Scope & Content: Photograph of an autograph letter, signed, from Christoph Willibald Gluck to Valadier, dated 1 May 1785. Collection Area: Music Collections Languages: Undetermined Date Range: 31 Jan 1991 Extent: 2 black and white prints