1Enclosure: Nicholas Biddle to William Tilghman, 6 April 1818 (Jefferson Papers)
language; Indian (American) [index entry]
2William Clark to Thomas Jefferson, 10 October 1816 (Jefferson Papers)
language; Indian (American) [index entry]
3Enclosure: Edy Turner’s Vocabulary of the Nottoway Language, 4 March 1820 (Jefferson Papers)
language; Indian (American) [index entry]
4Enclosure: Peter S. Du Ponceau’s Comparison of Indian Numerals, [ca. 12 July 1820] (Jefferson Papers)
language; Indian (American) [index entry]
5Peter S. Du Ponceau to Thomas Jefferson, 14 April 1818 (Jefferson Papers)
language; Indian (American) [index entry]
6Peter S. Du Ponceau to Thomas Jefferson, 14 December 1820 (Jefferson Papers)
language; Indian (American) [index entry]
7Peter S. Du Ponceau to Thomas Jefferson, 13 July 1820 (Jefferson Papers)
language; Indian (American) [index entry]
8Peter S. Du Ponceau to Thomas Jefferson, 11 December 1817 (Jefferson Papers)
language; Indian (American) [index entry]
9Peter S. Du Ponceau to Thomas Jefferson, 18 July 1820 (Jefferson Papers)
language; Indian (American) [index entry]
10Enclosure: Peter S. Du Ponceau’s Comparison of the Nottoway and Iroquois Languages, [ca. 13 July 1820] (Jefferson Papers)
language; Indian (American) [index entry]