1Thomas Jefferson to Arthur S. Brockenbrough, 20 April 1821 (Jefferson Papers)
building materials; cement, Roman [index entry]
2Thomas Jefferson to William J. Coffee, 15 May 1819 (Jefferson Papers)
building materials; cement, Roman [index entry]
3Thomas Jefferson to Patrick Gibson, 26 July 1821 (Jefferson Papers)
building materials; cement, Roman [index entry]
4Andrew Smith to Thomas Jefferson, 16 April 1821 (Jefferson Papers)
building materials; cement, Roman [index entry]
5Bernard Peyton to Thomas Jefferson, 21 February 1822 (Jefferson Papers)
building materials; cement, Roman [index entry]
6Bernard Peyton to Thomas Jefferson, 11 February 1822 (Jefferson Papers)
building materials; cement, Roman [index entry]
7Andrew Smith to Thomas Jefferson, 31 July 1821 (Jefferson Papers)
building materials; cement, Roman [index entry]
8Martha Jefferson Randolph to Thomas Jefferson, 7 August 1819 (Jefferson Papers)
building materials; cement, Roman [index entry]
9Bernard Peyton to Thomas Jefferson, 19 August 1822 (Jefferson Papers)
building materials; cement, Roman [index entry]
10Bernard Peyton to Thomas Jefferson, 28 July 1819 (Jefferson Papers)
building materials; cement, Roman [index entry]