John James Audubon (1831). “Ornithological Biography, Or an Account of the Habits of the Birds of the United States of America: Accompanied by Descriptions of the Objects Represented in the Work Entitled The Birds of America, and Interspersed with Delineations of American Scenery and Manners”, p.7
"The Life and Adventures of John James Audubon, the Naturalist". Book by Robert Buchanan, on a meeting with a young artist, Mr. J. B. Kidd, Ch. X, p. 140, 1868.