1Thomas Jefferson to Thomas Cooper, 16 January 1814 (Jefferson Papers)
patents; of O. Evans [index entry]
2Thomas Jefferson to Oliver Evans, 16 January 1814 (Jefferson Papers)
patents; of O. Evans [index entry]
3Thomas Jefferson to Isaac McPherson, 18 September 1813 (Jefferson Papers)
patents; of O. Evans [index entry]
4Thomas Jefferson to Isaac McPherson, 13 August 1813 (Jefferson Papers)
patents; of O. Evans [index entry]
5Thomas Jefferson to Charles Willson Peale, 13 June 1815 (Jefferson Papers)
patents; of O. Evans [index entry]
6Thomas Jefferson to John Staples, 25 January 1814 (Jefferson Papers)
patents; of O. Evans [index entry]