2 pages, 4to, 280 x 215 mm. (11 x 8½ in.), half of verso slightly browned, otherwise in very good condition." /> EINSTEIN, ALBERT. Autograph letter signed ("Papa") to Eduard Einstein, [Princeton], 10 April 1936. <I>2 pages, 4to, 280 x 215 mm. (11 x 8½ in.), half of verso slightly browned,</I> otherwise in very good condition. | Christie's