1Charles Willson Peale to Thomas Jefferson, 28 December 1813 (Jefferson Papers)
agriculture; straw-cutting machine [index entry]
2Thomas Jefferson to Charles Willson Peale, 21 March 1815 (Jefferson Papers)
agriculture; straw-cutting machine [index entry]
3Charles Willson Peale to Thomas Jefferson, 2 May 1815 (Jefferson Papers)
agriculture; straw-cutting machine [index entry]