Two Typed Letters from Albert Einstein to Kato van Leeuwen, 1940 and 1945 [SIGNED]
Letters in original postmarked envelopes, typed to sheet with A. Einstein address embossed at top: 112 Mercer Street, Princeton, New Jersey, USA.1. Letter to Miss K. van Leeuwen, 214 Riverside Dr., Apt. 75, New York City; postmarked June 6, 1940, PrincetonIn German. Einstein suggests that his friends in foreign countries..... More