Over 1,000 original editorial cartoons (1943-1966); small quanities of photographs, exhibition catalogs, clippings and published material; one video recording and one letter.

Papers of the American cartoonist, illustrator and painter including drawings, cartoons, photographs and printed material

Original cartoons and illustrations, sketches, clippings, photographs, correspondence and printed material.

Correspondence, financial and legal material, memorabilia, fanzines, and writings including short stories, plays, novels, novellas, and miscellaneous items.

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.