Papers of the American sculptor, painter, interior decorator, poet, author. Collection includes correspondence, artwork (sketches, watercolors), exhibition catalogs, photographs, writings, and memorabilia, including financial material.

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.