1Thomas Jefferson to William Clark, 8 September 1816 (Jefferson Papers)
language; Indian (American) [index entry]
2Thomas Jefferson to Peter S. Du Ponceau, 7 July 1820 (Jefferson Papers)
language; Indian (American) [index entry]
3Thomas Jefferson to Peter S. Du Ponceau, 14 March [1819] (Jefferson Papers)
language; Indian (American) [index entry]
4Thomas Jefferson to Peter S. Du Ponceau, 7 November 1817 (Jefferson Papers)
language; Indian (American) [index entry]
5Thomas Jefferson to Peter S. Du Ponceau, 30 December 1817 (Jefferson Papers)
language; Indian (American) [index entry]
6Peter S. Du Ponceau to Thomas Jefferson, 14 April 1818 (Jefferson Papers)
language; Indian (American) [index entry]
7Peter S. Du Ponceau to Thomas Jefferson, 14 December 1820 (Jefferson Papers)
language; Indian (American) [index entry]
8Peter S. Du Ponceau to Thomas Jefferson, 13 July 1820 (Jefferson Papers)
language; Indian (American) [index entry]
9Peter S. Du Ponceau to Thomas Jefferson, 11 December 1817 (Jefferson Papers)
language; Indian (American) [index entry]
10Peter S. Du Ponceau to Thomas Jefferson, 18 July 1820 (Jefferson Papers)
language; Indian (American) [index entry]