1Thomas Jefferson to Lewis Cass, 31 May 1821 (Jefferson Papers)
American Philosophical Society; members of [index entry]
2Thomas Jefferson to Tench Coxe, 13 October 1820 (Jefferson Papers)
American Philosophical Society; members of [index entry]
3Thomas Jefferson to Antonio Dugnani, 14 February 1818 (Jefferson Papers)
American Philosophical Society; members of [index entry]
4Thomas Jefferson to Dugald Stewart, 21 December 1818 (Jefferson Papers)
American Philosophical Society; members of, foreign [index entry]
5Thomas Jefferson to Isaiah Thomas, 14 October 1820 (Jefferson Papers)
American Philosophical Society; members of [index entry]