1. RP 7488 Reference (shelfmark): RP 7488 Title: Scope & Content: EINSTEIN, Albert 2 Autograph Letters Signed to his son Eduard, about his assistant, Walther Mayer and Unified Field Theory. Christie's, 7 June 2000, Lot 29 Creation dates: 24 Jan 1930, 5 Feb 1930 Collection Area: Western Manuscripts Languages: Undetermined Date Range: 26 Jun 2000 Extent: 3 photocopies