TLS from Olin Downes, 4 November 1939; TLS from H. L. Mencken, 7 August 1946; ALS from Robert Nathan, n.d.; TLS from Howard R. Patch, 15 March 1961; ALS from C. S. Lewis, 14 March 1961. AM 18895
TLS to the Department of Dramatics at Princeton, offering a 3-Act tragedy on Cicero, 15 March 1960; copy of TLS to Abraham Feldman regarding Phillips, 25 September 1944; propaganda from CA gubernatorial election, fake dollar, 1922. AM 20903, 21265
3 ALsS to various correspondents, 1792-1800; DS to Isaac Bears, 14 March 1772; 2 portraits of Thomas, n.d.; newspaper clippings regarding Thomas, 1912-1950 . AM 15926
2 ALsS to Walter Teller, 9 February and 9 December 1972; 2 printed programs, 1917 and 1958; ALS (Xerox) to Horace Traubel from J. H. Johnston, 28 September 1906. AM 79-93