1Thomas Jefferson to John Hollins, 5 February 1810 (Jefferson Papers)
Richmond, Va.; and gypsum [index entry]
2Thomas Jefferson to John Hollins, 8 April 1810 (Jefferson Papers)
Richmond, Va.; and gypsum [index entry]
3John Hollins to Thomas Jefferson, 22 April 1810 (Jefferson Papers)
Richmond, Va.; and gypsum [index entry]
4Thomas Jefferson to John Hollins, 20 January 1811 (Jefferson Papers)
Richmond, Va.; and gypsum [index entry]
5John Hollins to Thomas Jefferson, 27 January 1811 (Jefferson Papers)
Richmond, Va.; and gypsum [index entry]
6George Jefferson to Thomas Jefferson, 15 March 1811 (Jefferson Papers)
Richmond, Va.; and gypsum [index entry]
7Henry Dearborn to Thomas Jefferson, 3 December 1815 (Jefferson Papers)
Richmond, Va.; and gypsum [index entry]
8Bernard Peyton to Thomas Jefferson, 19 March 1816 (Jefferson Papers)
Richmond, Va.; and gypsum [index entry]