1Benjamin Smith Barton to Thomas Jefferson, 14 September 1809 (Jefferson Papers)
Pawnee Indians [index entry]
2Thomas Jefferson to Benjamin Smith Barton, 21 September 1809 (Jefferson Papers)
Pawnee Indians [index entry]
3Francis Adrian Van der Kemp to Thomas Jefferson, 12 March 1821 (Jefferson Papers)
Black Pawnee Indians (Paniouassas) [index entry]