ALBERT EINSTEIN Fine content T.L.S. "A. Einstein " 1p. 4to., on Princeton letterhead, May 7, 1943, in German to Ernst Rathenau, in part: "...Your conclusions appear to be extremely sensible to me. I cannot judge whether the complication of the double-shell is justified in the present case, because I am not sufficiently acquainted with the torpedo and the nature of the combination of steps, connected to reaching the mark thereof. I have heard extensively of one test for making the torpedo explode beforehand, but I do not know whether that idea proved workable. I myself am not at all occupied with militarily-physical questions, but I did have the opportunity to observe, that outside suggestions are really only considered in a very superficial matter... ". With the original envelope, in fine condition.$2,000-3,000