The McClure mss. VI, 1893-1952, consists of the papers of editor S. S. (Samuel Sidney) McClure, 1857-1949, concerned chiefly with operations of McClure's Magazine, its advertising and circulation rates, and several legal cases in relation to the magazine.
The Corrigan mss., 1888-1941, consists of letters to publisher James William Corrigan, 1867?-1948, relating primarily to publishing matters in Great Britain and the United States.
The McClure mss. IV, 1884-1922, consists of letters to editor S. S. (Samuel Sidney) McClure, 1857-1949, and to a few of his associates, from editors, artists, journalists, politicians, and literary figures concerning articles for McClure's Magazine.