1Thomas Jefferson to John Adams, 15 August 1820 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
2Thomas Jefferson to Thomas Cooper, 14 August 1820 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
3John Laval to Thomas Jefferson, 25 April 1817 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
4Nicolas G. Dufief to Thomas Jefferson, 30 January 1817 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
5Nicolas G. Dufief to Thomas Jefferson, 30 January 1817 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
6Nicolas G. Dufief to Thomas Jefferson, 7 January 1817 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
7Thomas Jefferson to Nicolas G. Dufief, 14 December 1816 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
8Thomas Jefferson: Book List, [after 6 October 1815] (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
9Thomas Jefferson to John Adams, 24 January 1814 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
10Thomas Jefferson to John Adams, 12 October 1813 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]