1. RP 7400 Reference (shelfmark): RP 7400 Title: Scope & Content: DARWIN, Charles Autograph Letter Signed to Sir Roderick Murchison, 1 May [endorsed May 1860]. Sotheby's, 8 Dec 1999, Lot 91 Creation dates: 1 May 1860 Collection Area: Western Manuscripts Languages: English Date Range: 21 Mar 2000 Extent: 1 black and white print