lower right in plate: W.H; lower left in plate: LAGARDE; lower center: RAID ON A SAND-SWALLOW COLONY.-"HOW MANY EGGS?"-[Drawn by Winslow Homer.]
- 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.
- Gelman 1969, no.250.
- Kelsey 1977, no.235.
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