1Thomas Jefferson to Peter S. Du Ponceau, 14 March [1819] (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
2Thomas Jefferson to Peter S. Du Ponceau, 17 January 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
3Thomas Jefferson to Peter S. Du Ponceau, 19 February 1818 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
4Thomas Jefferson to Peter S. Du Ponceau, 22 January 1816 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
5Thomas Jefferson to Peter S. Du Ponceau, 26 January 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
6Thomas Jefferson to Peter S. Du Ponceau, 7 November 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
7Thomas Jefferson to Peter S. Du Ponceau, 6 November 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]
8Thomas Jefferson to Peter S. Du Ponceau, 30 December 1817 (Jefferson Papers)
American Philosophical Society, Historical and Literary Committee; TJ sends works to [index entry]