Papers of the American painter, art critic. Correspondence, 1910-1969; holograph and typescript essays, lectures, and speeches; photographs; and printed material, including articles, exhibition catalogs, and material relating to the National Academy of Design, of which Clark wrote a history.

Correspondence, family, business, and personal (1927-1967); artwork, including photographs and reproductions of Martinelli's United Nations commission; statements on his work; and printed material, including clippings about Martinelli (1928-1968), and exhibition announcements, catalogs, and invitations (1934-1968). Correspondents include Aldo John Casanova, Ed Colker, Martin Craig, Dorothy Dehner, Helmut von Erffa, Giannetto Fieschi, Horace Gregory, Peter Grippe, Edmund Haines, Stanley Hayter, Louis I. Kahn, Leon Kelly, Leon Kroll, Norman Lewis, Sam Maitin, Barbara Brooks Morgan, Marnie Pomeroy, Melville Price, Walter Reinsel, Theodore Roszak, Charles Seide, Helena Simkhovitch, David Smith, and Carl Zigrosser.

Correspondence (1917-1965); artwork, including lithographic plates and sketches; photographs and reproductions of paintings; and printed material, including clippings (1928-1965), exhibition catalogs (1927-1965), and reviews. Correspondents include Bill Alexander, the American Artists Group, Inc., Erwin S. Barrie, Ray Bethers, George Biddle, Julius Bloch, Mortimer Borne, W. Sterry Branning, Lucile E. Bush, Millicent Carey, the Carnegie Institute, the Chesapeake and Ohio Railway Compnay, Van Cort, Russell Cowles, Katharine Day, Dorothy Dehner, Juliana Force, Kathryn Gamble, Daisy Gill, Lloyd Goodrich, Buckner Hollingsworth, Kaj Klitgaard, Yasuo Kuniyoshi, Archibald MacLeish, Hughes Mearns, Hermon More, Hobson Pittman, Frances M. Pollak, Henry Varnum Poor, Homer Saint-Gaudens, Silvia Saunders, Jean Paul Slusser, Charles A. Smart, Carl Spaatz, Eugene Speicher, Francis H. Taylor, Zoraida E. Weeks, and William Zorach.

Correspondence (1914-1966); photographs, sketchbooks, and published material, including articles and clippings. Correspondents include Egmont Arens, Peggy Bacon, Rockwell Kent, Alfred Kreymborg, Harry E. Maule, William McFee, Ogden Nash, John Crowe Ransom, Henry Morton Robinson, Franklin D. Roosevelt, Charles Allen Smart, and Lowell Thomas. Additional letters of many of the correspondents can be found in a scrapbook.

Papers of the American still-life and portrait painter; specialized in the female figure. Collection includes correspondence concerning art exhibitions (1945-1953); artwork reproductions, statements on art, and memorabilia, including articles and clippings about Bassford (1953-1968) as well as his exhibition catalogs (1939-1962).

Papers of the American painter, illustrator, cartoonist, lithographer. Correspondence (1927-1950); original drawings, paintings, and prose by Gropper and others; published material, including cartoons from New Masses, clippings, exhibition lists, and illustrations (1918-1968); and a scrapbook containing birthday congratulations.