1Peter S. Du Ponceau to Thomas Jefferson, 5 December 1817 (Jefferson Papers)
Indians, American; Algonquian [index entry]
2Peter S. Du Ponceau to Thomas Jefferson, 22 January 1818 (Jefferson Papers)
Indians, American; Algonquian [index entry]
3Peter S. Du Ponceau to Thomas Jefferson, 12 July 1820 (Jefferson Papers)
Indians, American; Algonquian [index entry]
4Peter S. Du Ponceau to Thomas Jefferson, 12 September 1820 (Jefferson Papers)
Indians, American; Algonquian [index entry]