1Thomas Jefferson to William Duane, 22 January 1813 (Jefferson Papers)
A Treatise on Political Economy (Destutt de Tracy) [index entry]
2Thomas Jefferson to William Duane, 18 September 1813 (Jefferson Papers)
A Treatise on Political Economy (Destutt de Tracy) [index entry]
3Thomas Jefferson to William Duane, 24 November 1814 (Jefferson Papers)
A Treatise on Political Economy (Destutt de Tracy) [index entry]
4Thomas Jefferson to William Duane, 10 February 1815 (Jefferson Papers)
A Treatise on Political Economy (Destutt de Tracy) [index entry]
5Thomas Jefferson to William Duane, 24 January 1817 (Jefferson Papers)
A Treatise on Political Economy (Destutt de Tracy) [index entry]