Records the rediscovery of Audubon's long lost and discredited yellow water lily, Nymphæa flava, by Mrs. Mary Treat, in Florida, in the summer of 1876. Originally figured by Audubon, with the Common American swan, on Plate ccccxi, of The Birds of America, in 1838.
Birds of the Colorado Valley, Bibliographical Appendix: "List of Faunal Publications relating to North American Ornithology," pp. 567-746. 8vo. Washington, 1878.
Gives full citations of the various editions of Audubon's works. "It takes an inspired idiot to be a good bibliographer" (Coues).
"Letter to J. M. Wade on Audubon's Mill," Ornithologist and Oölogist, vol. 8, p. 79. Boston, 1883.
"Rafinesque," Popular Science Monthly, vol. xxix, pp. 212-221 (June). New York, 1886. Reproduced in Pioneers of Science in America, edited by William Jay Youmans (New York, 1896).