1William Duane to Thomas Jefferson, 17 August 1810 (Jefferson Papers)
Lectures on Political Principles (Williams) [index entry]
2Thomas Jefferson to William Duane, 16 September 1810 (Jefferson Papers)
Lectures on Political Principles (Williams) [index entry]
3William Duane to Thomas Jefferson, 29 October 1810 (Jefferson Papers)
Lectures on Political Principles (Williams) [index entry]
4Thomas Jefferson to Destutt de Tracy, 26 January 1811 (Jefferson Papers)
Lectures on Political Principles (Williams) [index entry]