1Thomas Jefferson to John Adams, 12 October 1813 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
2Thomas Jefferson to John Adams, 24 January 1814 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
3Thomas Jefferson to John Adams, 22 August 1813 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
4Thomas Jefferson to John Adams, 15 August 1820 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
5Thomas Jefferson to Thomas Cooper, 14 August 1820 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
6Thomas Jefferson to Nicolas G. Dufief, 14 December 1816 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
7Nicolas G. Dufief to Thomas Jefferson, 30 January 1817 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
8John Laval to Thomas Jefferson, 25 April 1817 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
9Nicolas G. Dufief to Thomas Jefferson, 7 January 1817 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]
10Nicolas G. Dufief to Thomas Jefferson, 30 January 1817 (Jefferson Papers)
The History of Philosophy (W. Enfield) [index entry]