1Thomas Jefferson to Nicholas Biddle, 20 August 1813 (Jefferson Papers)
Biddle, Nicholas; and history of Lewis and Clark Expedition [index entry]
2Nicholas Biddle to Thomas Jefferson, 28 September 1813 (Jefferson Papers)
Biddle, Nicholas; and history of Lewis and Clark Expedition [index entry]
3Editorial Note (Jefferson Papers)
Biddle, Nicholas; and history of Lewis and Clark Expedition [index entry]
4C. & A. Conrad & Company to Thomas Jefferson, [received 15 April 1810] (Jefferson Papers)
Biddle, Nicholas; and history of Lewis and Clark Expedition [index entry]
5Thomas Jefferson to Paul Allen, 5 August 1813 (Jefferson Papers)
Biddle, Nicholas; and history of Lewis and Clark Expedition [index entry]
6Thomas Jefferson to Paul Allen, 20 August 1813 (Jefferson Papers)
Biddle, Nicholas; and history of Lewis and Clark Expedition [index entry]
7Paul Allen to Thomas Jefferson, 18 August 1813 (Jefferson Papers)
Biddle, Nicholas; and history of Lewis and Clark Expedition [index entry]