1Thomas Jefferson’s Account with Joseph Milligan, [8–10 March 1809] (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
2Thomas Jefferson to Nathaniel Chapman, 11 December 1809 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
3John Adlum to Thomas Jefferson, 15 February 1810 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
4Thomas Jefferson to Silvain Godon, 21 May 1810 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
5William Lambert to Thomas Jefferson, 23 April 1812 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
6Thomas Jefferson to Mathew Carey, 19 June 1813 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
7Thomas Jefferson to George Hargraves, 29 August 1814 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
8Thomas Jefferson to William Wirt, 5 August 1815 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
9Alden Partridge to Thomas Jefferson, 6 September 1815 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
10Enclosure: Alden Partridge’s Table of Altitudes of Northern Mountains, [before 6 September 1815] (Jefferson Papers)
American Philosophical Society; Transactions [index entry]