1Thomas Jefferson to Charles Willson Peale, 10 March 1809 (Jefferson Papers)
machines; polygraph [index entry]
2Charles Willson Peale to Thomas Jefferson, 25 June 1809 (Jefferson Papers)
machines; polygraph [index entry]
3Thomas Jefferson to John Wayles Eppes, 5 January 1811 (Jefferson Papers)
machines; polygraph [index entry]
4Benjamin Henry Latrobe to Thomas Jefferson, 1 August 1811 (Jefferson Papers)
machines; polygraph [index entry]
5Charles Willson Peale to Thomas Jefferson, 3 August [October] 1811 (Jefferson Papers)
machines; polygraph [index entry]
6Thomas Jefferson’s Account with Joseph Milligan, [ca. 16 August 1815] (Jefferson Papers)
machines; polygraph [index entry]
7Benjamin Henry Latrobe to Thomas Jefferson, 2 July 1812 (Jefferson Papers)
machines; polygraph [index entry]
8Thomas Jefferson to Burgess Allison, 20 October 1813 (Jefferson Papers)
machines; polygraph [index entry]
9Francis C. Gray’s Account of a Visit to Monticello, [4–7 February 1815] (Jefferson Papers)
machines; polygraph [index entry]
10Thomas Jefferson to Joseph Milligan, 1 June 1815 (Jefferson Papers)
machines; polygraph [index entry]