Correspondence, chiefly concerning Dunn's newspaper writings and books, from various members of congress and presidents Warren G. Harding, Theodore Roosevelt, and Woodrow Wilson; and family papers, including correspondence and scrapbooks of James Hall McKenney, clerk of the U.S. Supreme Court (1880-1913). McKenney's correspondents include Supreme Court justices Joseph P. Bradley, Stephen Johnson Field, Stanley Matthews, Edward John Phelps, and Noah Haynes Swayne.