1Thomas Jefferson to Henry Dearborn, 27 October 1818 (Jefferson Papers)
American Ornithology (A. Wilson) [index entry]
2Thomas Cooper to Thomas Jefferson, 6 October 1818 (Jefferson Papers)
American Ornithology (A. Wilson) [index entry]
3Thomas Jefferson to James Wilkinson, 25 June 1818 (Jefferson Papers)
American Ornithology (A. Wilson) [index entry]