1Peter S. Du Ponceau to Thomas Jefferson, 22 January 1818 (Jefferson Papers)
New Views of the Origin of the Tribes and Nations of America (B. S. Barton) [index entry]
2Enclosure: Edy Turner’s Vocabulary of the Nottoway Language, 4 March 1820 (Jefferson Papers)
New Views of the Origin of the Tribes and Nations of America (B. S. Barton) [index entry]
3Enclosure: Peter S. Du Ponceau’s Comparison of the Nottoway and Iroquois Languages, [ca. 13 July 1820] (Jefferson Papers)
New Views of the Origin of the Tribes and Nations of America (B. S. Barton) [index entry]