1Thomas Jefferson to Mathew Carey, 19 June 1813 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
2Thomas Jefferson to Nathaniel Chapman, 11 December 1809 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
3Thomas Jefferson to Peter S. Du Ponceau, 7 November 1817 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
4Thomas Jefferson to Silvain Godon, 21 May 1810 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
5Thomas Jefferson to George Hargraves, 29 August 1814 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
6Thomas Jefferson to David Hosack, [20 October 1819] (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
7Peter S. Du Ponceau to Thomas Jefferson, 5 January 1818 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
8Peter S. Du Ponceau to Thomas Jefferson, 14 February 1818 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
9Peter S. Du Ponceau to Thomas Jefferson, 22 January 1818 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
10William Lambert to Thomas Jefferson, 23 April 1812 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]