Some years ago the late Dr. Theodore Gill published an article in which he announced the discovery of a fourth volume of the first edition of Holbrook's "North American Herpetology" (1840), of which but three volumes had been known. This copy was found in the library of the Academy of Natural Sciences of Philadelphia, and Dr. Gill's article was based on a report of its contents furnished by Mr. Witmer Stone.
Proceedings of the Iowa Academy of Science
©1924 Iowa Academy of Science, Inc.
"Holbrook's North American Herpetology. First Edition.,"
Proceedings of the Iowa Academy of Science, 31(1), 427-430.
Available at: https://scholarworks.uni.edu/pias/vol31/iss1/147