11Thomas Jefferson to Oliver Evans, 16 January 1814 (Jefferson Papers)
patents; of O. Evans [index entry]
12Thomas Jefferson to Thomas Cooper, 16 January 1814 (Jefferson Papers)
patents; of O. Evans [index entry]
13Isaac McPherson to Thomas Jefferson, 28 August 1813 (Jefferson Papers)
patents; of O. Evans [index entry]
14Isaac McPherson to Thomas Jefferson, 2 January 1814 (Jefferson Papers)
patents; of O. Evans [index entry]
15Isaac McPherson to Thomas Jefferson, 3 August 1813 (Jefferson Papers)
patents; of O. Evans [index entry]
16John Moody to Thomas Jefferson, January 1812 (Jefferson Papers)
patents; of O. Evans [index entry]
17John Wharton (1771–1845) to Thomas Jefferson, 8 July 1818 (Jefferson Papers)
patents; of O. Evans [index entry]