11Thomas Jefferson to Antonio Dugnani, 14 February 1818 (Jefferson Papers)
American Philosophical Society; members of [index entry]
12Thomas Jefferson to Dugald Stewart, 21 December 1818 (Jefferson Papers)
American Philosophical Society; members of, foreign [index entry]
13Thomas Jefferson to Lewis Cass, 31 May 1821 (Jefferson Papers)
American Philosophical Society; members of [index entry]
14Thomas Jefferson to Tench Coxe, 13 October 1820 (Jefferson Papers)
American Philosophical Society; members of [index entry]
15Thomas Jefferson to Isaiah Thomas, 14 October 1820 (Jefferson Papers)
American Philosophical Society; members of [index entry]
16Thomas P. Jones to Thomas Jefferson, 5 March 1821 (Jefferson Papers)
American Philosophical Society; members of [index entry]
17William H. Keating to Thomas Jefferson, 1 July 1822 (Jefferson Papers)
American Philosophical Society; members of [index entry]
18William James Macneven to Thomas Jefferson, 18 December 1821 (Jefferson Papers)
American Philosophical Society; members of [index entry]
19George Alexander Otis to Thomas Jefferson, 20 June 1820 (Jefferson Papers)
American Philosophical Society; members of [index entry]
20Timothy Pickering to Thomas Jefferson, 12 February 1821 (Jefferson Papers)
American Philosophical Society; members of [index entry]