lower left in plate: WH; across bottom: UNION MEETINGS IN THE OPEN AIR OUTSIDE THE ACADEMY OF MUSIC, DECEMBER 19, 1859.
- Foster, Allen Evarts. "A check list of illustrations by Winslow Homer in 'Harper's Weekly' and other periodicals." Bulletin of the New York Public Library 40 (1936): 842-852. Separately published New York: New York Public Library, 1936.