1Thomas Jefferson to Silvain Godon, 21 May 1810 (Jefferson Papers)
American Philosophical Society; members of [index entry]
2Thomas Jefferson to Robert Patterson, 1 October 1809 (Jefferson Papers)
American Philosophical Society; members of [index entry]
3Thomas Jefferson to Robert Patterson, 23 November 1814 (Jefferson Papers)
American Philosophical Society; members of [index entry]
4Thomas Jefferson to Robert Patterson, 31 August 1809 (Jefferson Papers)
American Philosophical Society; members of [index entry]
5Thomas Jefferson to Caspar Wistar, 31 March 1809 (Jefferson Papers)
American Philosophical Society; members of [index entry]
6Thomas Jefferson to William Barton, 2 October 1812 (Jefferson Papers)
American Philosophical Society; members of [index entry]
7Thomas Jefferson to Charles Thomson, 9 January 1816 (Jefferson Papers)
American Philosophical Society; members of [index entry]
8Thomas Jefferson to Robert R. Livingston, 20 April 1812 (Jefferson Papers)
American Philosophical Society; members of [index entry]