1Robert Patterson to Thomas Jefferson, 23 September 1811 (Jefferson Papers)
American Philosophical Society; and weights, measures, and coins [index entry]
2Thomas Jefferson to Robert Patterson, 10 November 1811 (Jefferson Papers)
American Philosophical Society; and weights, measures, and coins [index entry]
3Robert Patterson to Thomas Jefferson, 10 January 1812 (Jefferson Papers)
American Philosophical Society; and weights, measures, and coins [index entry]