1Thomas Jefferson to Philip Tabb, 1 June 1809 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
2Thomas Jefferson to Joel Barlow, 31 December 1809 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
3Joel Barlow to Thomas Jefferson, 15 January 1810 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
4Thomas Jefferson to Joel Barlow, 24 January 1810 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
5Thomas Jefferson to James Madison, 25 March 1810 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
6James Madison to Thomas Jefferson, 2 April 1810 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
7Thomas Jefferson to Robert Fulton, 16 April 1810 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
8Thomas Jefferson to James Madison, 16 April 1810 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
9James Madison to Thomas Jefferson, 23 April 1810 (Jefferson Papers)
plows.; TJ’s moldboard [index entry]
10Théodore Pahlen’s Account of a Visit to Monticello, [between 15 April and 15 May 1811] (Jefferson Papers)
plows; TJ’s moldboard [index entry]