Monroe's writings were edited by S. M. Hamilton (7 vol., 1898–1903, repr. 1969). See his autobiography (ed. with introd. by S. G. Brown, 1959); biographies by G. Morgan (1921, repr. 1969), A. Styron (1945), and W. P. Cresson (1946, repr. 1971); studies by L. Wilmerding (1960) and H. Ammon (1971).