Papers of the American art museum director, painter, principally of seascapes. Correspondence (1914-1955); manuscripts, photographs, scrapbooks (1922-1938), and published material by and about Hekking.
Papers of the African-American clergyman. Correspondence, writings (including sermons by Imes and his father Benjamin A. Imes), memorabilia (including numerous small scrapbooks), and subject files.
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.