1Thomas Jefferson to William Barton, 2 October 1812 (Jefferson Papers)
Memoirs of the Life of David Rittenhouse (W. Barton) [index entry]
2Thomas Jefferson to John Adams, 24 January 1814 (Jefferson Papers)
Memoirs of the Life of David Rittenhouse (W. Barton) [index entry]
3Thomas Jefferson to Nicolas G. Dufief, 16 August 1814 (Jefferson Papers)
Memoirs of the Life of David Rittenhouse (W. Barton) [index entry]