lower left in plate: FOX; lower center: A SUPERB LION AND LIONESS, NOW EXHIBITING IN BOSTON.
- 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.
- Tatham, David. "Winslow Homer in Boston, 1954-1859." Ph.D. dissertation, Syracuse University, New York, 1970: 162.
- Kelsey 1977, no.50.