1Philip Thornton to Thomas Jefferson, 19 November 1814 (Jefferson Papers)
Natural Bridge, Va.; and shot manufactory [index entry]
2Philip Thornton to Thomas Jefferson, 17 March 1818 (Jefferson Papers)
Natural Bridge, Va.; and shot manufactory [index entry]
3Thomas Jefferson’s Agreement to Lease Natural Bridge to Philip Thornton, 2 December 1814 (Jefferson Papers)
Natural Bridge, Va.; and shot manufactory [index entry]