Haitian-born American ornithologist and artist (1785–1851) whose monumental pictorial studies of the birds and quadrupeds of North America take a place among the most distinguished accomplishments in the history of zoology and natural history illustration. ALS, one page, 6.75 x 4.5, April 6, 1847. Audubon writes to C. A. Clinton, Esq. In part: “I can faithfully say that as far as my acquaintance with the habits of the horse and the hog goes, that the hog certainly eats the greater variety of vegetables. We will be happy to see you here … as soon as you can fit it convenient….” In very good condition, with wrinkles, mailing fold touching signature, a few faint stains, and trimmed edges. The writing is dark throughout. LOA John Reznikoff/PSA/DNA and R&R COA.