The papers consist of correspondence, scrapbooks, writings, and photographs documenting the political and diplomatic career of James Rockwell Sheffield. The bulk of the material dates from 1893 to 1938 and concerns either the New York Republican party and its influence on National politics or American diplomatic relations with Mexico during the Coolidge administration. Major correspondents include William Boyd Allison, Nicholas Murray Butler, Theodore Roosevelt, Elihu Root, William Howard Taft, and James R. Wadsworth.