1Thomas Jefferson to William Clark, 8 September 1816 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
2Thomas Jefferson to José Corrêa da Serra, 26 April 1816 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
3Thomas Jefferson to Peter S. Du Ponceau, 7 November 1817 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
4Thomas Jefferson to Peter S. Du Ponceau, 30 December 1817 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
5William Clark to Thomas Jefferson, 10 October 1816 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
6Peter S. Du Ponceau to Thomas Jefferson, 14 February 1818 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
7John Vaughan to Thomas Jefferson, 18 June 1817 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
8Peter S. Du Ponceau to Thomas Jefferson, 6 January 1818 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
9John Vaughan to Thomas Jefferson, 2 June 1817 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]
10Enclosure: Nicholas Biddle to William Tilghman, 6 April 1818 (Jefferson Papers)
Lewis and Clark Expedition; and Indian vocabularies [index entry]