- 2001, Transfer from the Yale University Library, Numismatic Collection
- Gift of Dr. William Gilman Thompson, Ph.B. 1877
- Museum's website (accessed April 2017)
- 1907 Forrer
Leonard Forrer, Biographical dictionary of medallists, New York, 1907, vol. IV, p. 463 (date: 1904)
Subject is from a fable by La Fontaine.