Correspondence, memoranda, scrapbooks, photographs, and other papers relating chiefly to Barnes's service (1943-1945) as administrative assistant to President Franklin D. Roosevelt. Subjects include appointments, patronage, requests of servicemen, domestic political matters during World War II, and the interaction between the White House, Congress, the Democratic National Committee, and various executive departments, offices, and agencies. Scrapbooks and photographs concern his earlier career and his service with the U.S. Marine Corps during World War I. Correspondents include Chester Bowles, James Forrestal, Harry L. Hopkins, Lyndon B. Johnson, Estes Kefauver, Scott Wike Lucas, John W. McCormack, Sam Rayburn, and Eleanor Roosevelt.