1Thomas Jefferson to Isaac McPherson, 13 August 1813 (Jefferson Papers)
Jefferson, Thomas; Opinions on; O. Evans’s patent machinery [index entry]
2Isaac McPherson to Thomas Jefferson, 28 August 1813 (Jefferson Papers)
Jefferson, Thomas; Opinions on; O. Evans’s patent machinery [index entry]
3Thomas Jefferson to Isaac McPherson, 18 September 1813 (Jefferson Papers)
Jefferson, Thomas; Opinions on; O. Evans’s patent machinery [index entry]
4Thomas Jefferson to Thomas Cooper, 16 January 1814 (Jefferson Papers)
Jefferson, Thomas; Opinions on; O. Evans’s patent machinery [index entry]
5Thomas Jefferson to Oliver Evans, 16 January 1814 (Jefferson Papers)
Jefferson, Thomas; Opinions on; O. Evans’s patent machinery [index entry]
6Oliver Evans to Thomas Jefferson, 29 January 1814 (Jefferson Papers)
Jefferson, Thomas; Opinions on; O. Evans’s patent machinery [index entry]