1Thomas Jefferson to Joseph Milligan, [ca. 25 October 1818] (Jefferson Papers)
Jefferson, Thomas; Opinions on; Destutt de Tracy’s works [index entry]
2Thomas Jefferson to Joseph Milligan, 29 November 1818 (Jefferson Papers)
Jefferson, Thomas; Opinions on; Destutt de Tracy’s works [index entry]
3Thomas Jefferson to Joseph Milligan, 13 April 1819 (Jefferson Papers)
Jefferson, Thomas; Opinions on; Destutt de Tracy’s works [index entry]