1Thomas Jefferson to William Duane, 16 September 1810 (Jefferson Papers)
Jefferson, Thomas; Opinions on; Destutt de Tracy’s works [index entry]
2Thomas Jefferson to William Duane, 22 January 1813 (Jefferson Papers)
Jefferson, Thomas; Opinions on; Destutt de Tracy’s works [index entry]
3Thomas Jefferson to William Duane, 4 April 1813 (Jefferson Papers)
Jefferson, Thomas; Opinions on; Destutt de Tracy’s works [index entry]
4Thomas Jefferson to William Duane, 24 November 1814 (Jefferson Papers)
Jefferson, Thomas; Opinions on; Destutt de Tracy’s works [index entry]