"LIBEL SUIT AGAINST THE TIMES.: SECOND TRIAL OF THE SUIT BROUGHT BY THE COUNT JOANNES--TESTIMONY IN REGARD TO THE CHARACTER OF THE PLAINTIFF.." The New York Times, February 8, 1876, 2.
Brown, T. Allston. A History of the New York Stage from the First Performance in 1732 to 1901. New York: Dodd, Mead and Co., 1903.
Odell, George Clinton. Annals of the New York Stage: Volume VII (1857-1865). New York: Columbia University Press, 1931.
Wolle, Francis. Fitz-James O'Brien: A Literary Bohemian of the Eighteen-Fifties. Boulder, Col.; University of Colorado, 1944.
Armstrong, Walter P. "“A Vindication of a Much Maligned Man.”." American Bar Association Journal 36, no. 10 (1950): 829-832.