1. RP 7507 Reference (shelfmark): RP 7507 Title: Scope & Content: EINSTEIN, Albert Autograph Letter Signed & Autograph Postcard Signed to his sons Hans Albert and Eduard, from a lecture tour in Japan, etc Creation dates: 7 Oct 1922, 12 Dec 1922 Collection Area: Western Manuscripts Languages: Undetermined Date Range: 27 Jul 2000 Extent: 4 photocopies