Correspondence, speeches, writings, clippings, scrapbooks, and other papers relating primarily to Schwellenbach's service as U.S. senator from Washington (State) and U.S. secretary of labor in the Harry S. Truman presidential administration. Subjects include Schwellenbach's friendship with Truman, anti-alien legislation, anti-communism, civil liberties, Huey Long and the use of filibuster in the U.S. Senate, fishing and lumber industries in Washington (State), labor strikes, rights of the handicapped and veterans, the U.S. Labor Management Relations Act (Taft-Hartley Act of 1947), transition from a war-based to a peacetime economy, American neutrality in European wars, democracy in Spain and the Spanish Civil War (1936-1939), the rise of fascism under Adolph Hitler and Benito Mussolini, and U.S. relations with Japan. Correspondents include Frank T. Bell, John Nance Garner, Cordell Hull, Franklin D. Roosevelt, Harry S. Truman, and Schwellenbach's wife, Anne Duffy Schwellenbach.