Contains correspondence with galleries, museums, as well as Brooklyn College, Nicolas Calas, Alexander Calder, Charles Duits, Peggy and Howard Gibbs, Jean Hélion, Earle and Mary Ludgin, Claude Nerguy, Taro Okamoto, Édouard Roditi, Walter Skolnik, Yomiuri Shimbun (relating to the Japan Independent Art Exhibition), Kurt Wolff, and outgoing correspondence. Also includes printed ephemera.