1 page, 4to, 280 x 220 mm. (11 x 9 in.), four tiny staple punctures in blank margins." /> EINSTEIN, ALBERT. Autograph letter signed ("Papa") to Hans Albert Einstein, n.p., 7 March 1924. <I>1 page, 4to, 280 x 220 mm. (11 x 9 in.), four tiny staple punctures in blank margins</I>. | Christie's