Correspondence; diaries; journals; speeches; addresses; manuscripts of novels, short stories, and other works; literary notes; reviews; biographical material; financial records; scrapbooks; clippings; printed matter; memorabilia; photographs; and other papers relating chiefly to Whitlock's career as a writer, diplomat, and politician. Documents Whitlock's interest in civic progress, municipal administration, improved methods in law enforcement, and conditions in Belgium during World War I, with emphasis on American relief work. Includes Whitlock's journal of a visit by the King and Queen of Belgium to America (1919). Correspondents include Newton Diehl Baker, Nicholas Murray Butler, George Creel, Clarence Darrow, Hamlin Garland, Norman Hapgood, Herbert Hoover, Edward Mandell House, William Dean Howells, Tom Loftin Johnson, Albert Bigelow Paine, Louis F. Post, Lincoln Steffens, and Owen Wister.