1Thomas Jefferson to Destutt de Tracy, 28 November 1813 (Jefferson Papers)
2Thomas Jefferson to Isaac Doolittle, 18 September 1813 (Jefferson Papers)
3Enclosure: Destutt de Tracy to Pierre Samuel Du Pont de Nemours, 30 January 1816 (Jefferson Papers)
4Thomas Jefferson to Pierre Samuel Du Pont de Nemours, 3 August 1816 (Jefferson Papers)
5Thomas Jefferson to Pierre Samuel Du Pont de Nemours, 29 November-14 December 1813 (Jefferson Papers)
6Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 18 August 1816 (Jefferson Papers)
7Destutt de Tracy to Thomas Jefferson, [14] July 1814 (Jefferson Papers)
8Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 14 April 1812 (Jefferson Papers)
9Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 10 February 1813 (Jefferson Papers)
10Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 8 September 1813 (Jefferson Papers)