1Lafayette to Thomas Jefferson, 21 January 1816 (Jefferson Papers)
2Thomas Jefferson to Nicolas G. Dufief, 17 May 1816 (Jefferson Papers)
3Thomas Jefferson to Lafayette, 17 May 1816 (Jefferson Papers)
4Thomas Jefferson to Albert Gallatin, 18 May 1816 (Jefferson Papers)
5Nicolas G. Dufief to Thomas Jefferson, 27 May 1816 (Jefferson Papers)
6Albert Gallatin to Thomas Jefferson, 7 June 1816 (Jefferson Papers)
7Thomas Jefferson to Pierre Samuel Du Pont de Nemours, 3 August 1816 (Jefferson Papers)