1Isaac McPherson to Thomas Jefferson, 3 August 1813 (Jefferson Papers)
Evans, Oliver; originality of machinery questioned [index entry]
2Isaac McPherson to Thomas Jefferson, 28 August 1813 (Jefferson Papers)
Evans, Oliver; originality of machinery questioned [index entry]
3Isaac McPherson to Thomas Jefferson, 2 January 1814 (Jefferson Papers)
Evans, Oliver; originality of machinery questioned [index entry]
4Oliver Evans to Thomas Jefferson, 7 January 1814 (Jefferson Papers)
Evans, Oliver; originality of machinery questioned [index entry]
5Thomas Cooper to Thomas Jefferson, 31 May 1814 (Jefferson Papers)
Evans, Oliver; originality of machinery questioned [index entry]