1William Duane to Thomas Jefferson, 14 February 1813 [postscript, 9 March 1813] (Jefferson Papers)
Destutt de Tracy, Antoine Louis Claude; Élémens d’Idéologie [index entry]
2William Duane to Thomas Jefferson, 26 September 1813 (Jefferson Papers)
Destutt de Tracy, Antoine Louis Claude; Élémens d’Idéologie [index entry]
3William Duane to Thomas Jefferson, 11 August 1814 (Jefferson Papers)
Destutt de Tracy, Antoine Louis Claude; Élémens d’Idéologie [index entry]