1Thomas Jefferson to Nicolas G. Dufief, 14 December 1816 (Jefferson Papers)
2Thomas Jefferson to Nicolas G. Dufief, 1 January 1817 (Jefferson Papers)
3Nicolas G. Dufief to Thomas Jefferson, 7 January 1817 (Jefferson Papers)
4Thomas Jefferson to Nicolas G. Dufief, 24 January 1817 (Jefferson Papers)
5Enclosure: Thomas Jefferson’s Account with Nicolas G. Dufief (Jefferson Papers)