January 18, 1931. 2 pp. on one 4to sheet (10 7/8 x 8 1/2 in.; 28 x 22cm); signed in blue ink; small paper losses at blank edges. In German, to his publisher, disputing the publisher's interpretation of many of the contracts provisions relating to the disposition of his manuscript and of the schedule for publication of work, The History of the Russian Revolution. with Typed Letter with Secretarial signature. January 5, 1938. 1 p., 4to; light creasing. In English, to Max Shachtman, discussing the disposition of articles for publication in the New International, a leading Marxist periodical edited by Shachtman.