11John D. Godman and John P. Foote to Thomas Jefferson, 6 March 1822 (Jefferson Papers)
American Philosophical Society; members of [index entry]
12Thomas Jefferson to Antonio Dugnani, 14 February 1818 (Jefferson Papers)
American Philosophical Society; members of [index entry]
13Louis H. Girardin to Thomas Jefferson, 16 August 1820 (Jefferson Papers)
American Philosophical Society; members of [index entry]
14Pierre de Polética to Thomas Jefferson, 27 May 1819 (Jefferson Papers)
American Philosophical Society; members of, foreign [index entry]
15Benjamin Vaughan’s Notes on Climate Change, March 1819 (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]
17George Alexander Otis to Thomas Jefferson, 20 June 1820 (Jefferson Papers)
American Philosophical Society; members of [index entry]
18Thomas Jefferson to Lewis Cass, 31 May 1821 (Jefferson Papers)
American Philosophical Society; members of [index entry]
19Timothy Pickering to Thomas Jefferson, 12 February 1821 (Jefferson Papers)
American Philosophical Society; members of [index entry]
20John Sanderson to Thomas Jefferson, 19 August 1820 (Jefferson Papers)
American Philosophical Society; members of [index entry]