Wood, Frank. "O'Brien as Poet and Soldier." In The Poems and Stories of Fitz-James O'Brien; Collected and Edited, with a Sketch of the Author, edited by Winter, William. Boston: James R. Osgood and Company, 1881.
O'Brien, Fitz-James. "The Poems and Stories of Fitz-James O'Brien. Collected and Edited, with a Sketch of the Author, by William Winter." In The Poems and Stories of Fitz-James O'Brien. Collected and Edited, with a Sketch of the Author, by William Winter, edited by William Winter. Boston: J.R. Osgood and Co., 1881.
Arnold, George. "O'Brien's Personal Characteristics." In The Poems and Stories of Fitz-James O'Brien; Collected and Edited, with a Sketch of the Author, edited by Winter, William. Boston: James R. Osgood and Company, 1881.
Lathrop, George Parsons. "The Literary Movement in New York." Harper's New Monthly Magazine 73, no. 438 (1886): 813-833.
"Appletons' Cyclopaedia of American Biography, Volume VI, Sunderland-Zurita." In Appletons' Cyclopaedia of American Biography, Volume VI, Sunderland-Zurita, edited by Wilson, James Grant and John Fiske. New York: D. Appleton & Co., 1888.
"Appletons' Cyclopaedia of American Biography, Volume I, Aaron-Crandall." In Appletons' Cyclopaedia of American Biography, Volume I, Aaron-Crandall, edited by Wilson, James Grant and John Fiske. New York: D. Appleton & Co., 1888.
"In and about the City: Death of Charles I. Pfaff. Something about the Proprietor of the Once Famous "Bohemia."." New York Times, April 26, 1890, 2.
Ford, James L. "New York's Bohemia: A Kingdom Which Still Exists, Although Pfaff's Restaurant is No More." The Philadelphia Inquirer, November 27, 1892, 14.
"Died in Bowery Lodgings: Sad Ending of the Career of George G. Clapp." New York Times, April 10, 1893, 3.
The Vault at Pfaff's