2 pages, 8vo, 210 x 145 mm. (8¼ x 5 7/8 in.), on a sheet of foolscap from a notebook, pencil note of Frieda Einstein at top, with original envelope (addressed to Hans Albert in Dortmund) with stamps and postmarks." /> EINSTEIN, ALBERT. Autograph letter signed ("Albert") to Hans Albert Einstein, Berlin, 21 January 1928. <I>2 pages, 8vo, 210 x 145 mm. (8¼ x 5 7/8 in.), on a sheet of foolscap from a notebook, pencil note of Frieda Einstein at top, with original envelope (addressed to Hans Albert in Dortmund) with stamps and postmarks.</I> | Christie's