1To Thomas Jefferson from Albert Gallatin, 14 March 1803 (Jefferson Papers)
..., marking locations where the Pawnee and Mandan Indians lived. That information came from...
2Benjamin Smith Barton to Thomas Jefferson, 14 September 1809 (Jefferson Papers)
Mandan Indians [index entry]
3Robert Wash to Thomas Jefferson, 20 June 1811 (Jefferson Papers)
Mandan Indians [index entry]
4John Bradbury to Thomas Jefferson, 5 March 1812 (Jefferson Papers)
Mandan Indians [index entry]
5John Jacob Astor to Thomas Jefferson, 14 March 1812 (Jefferson Papers)
Mandan Indians [index entry]
6Henry M. Brackenridge to Thomas Jefferson, 25 July 1813 (Jefferson Papers)
Mandan Indians [index entry]
7Thomas Jefferson to Paul Allen, 18 August 1813 (Jefferson Papers)
Mandan Indians [index entry]