The Stokes mss., 1905-1906, consist primarily of letters from Upton Beall Sinclair, 1878-1968, novelist, to James Graham Phelps Stokes, 1872-1960, regarding the activities of the Intercollegiate Socialist Society.
The Sinclair mss. IV, 1900-1963, consists of correspondence, writings, and monetary statements of author Upton Beall Sinclair, 1878-1968, and of his wife, Mary Craig (Kimbrough) Sinclair, 1883-1961.
The Rogers, H.M. mss., 1895-1930, consist of letters from Booth Tarkington, 1869-1946, author, to Herbert Milton Rogers, 1870?-1931, lawyer, of Omaha, Nebraska, and former classmate of Tarkington at Princeton University.
The Overstreet mss., 1894-1985, consist of the correspondence, writings, lecture material, and memorabilia of married couple Harry Allen Overstreet and Bonaro Wilkinson Oversteet, who together wrote a bestselling book on Communism.
The Lockhart, R. mss., 1906-1969, consist of the correspondence, writings and memorabilia of Sir Robert Hamilton Bruce Lockhart, 1887-1970, diplomat and writer.