1Hugh Holmes to Thomas Jefferson, 10 March 1819 (Jefferson Papers)
machines; corn-shelling [index entry]
2Charles Willson Peale to Thomas Jefferson, 2 May 1815 (Jefferson Papers)
machines; corn-shelling [index entry]
3Charles Willson Peale to Thomas Jefferson, 28 December 1813 (Jefferson Papers)
machines; corn-shelling [index entry]