1Thomas Jefferson to Destutt de Tracy, 24 November 1818 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
2Destutt de Tracy to Thomas Jefferson, 15 November 1811 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
3Thomas Jefferson to Thomas Ritchie, 8 March 1816 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
4Thomas Jefferson to Thomas Ritchie, 6 April 1816 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
5Thomas Jefferson to Thomas Ritchie, 27 September 1814 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
6Thomas Ritchie to Thomas Jefferson, 27 March 1816 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
7Thomas Ritchie to Thomas Jefferson, 9 October 1814 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
8Thomas Jefferson to Pierre Samuel Du Pont de Nemours, 3 August 1816 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
9Thomas Jefferson to William Duane, 24 November 1814 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]
10Thomas Jefferson to Joseph C. Cabell, 5 January 1815 (Jefferson Papers)
Ritchie, Thomas; and works of Destutt de Tracy [index entry]