1Bernard Peyton to Thomas Jefferson, 28 July 1819 (Jefferson Papers)
building materials; cement, Roman [index entry] cement; Roman [index entry]
2Bernard Peyton to Thomas Jefferson, 11 February 1822 (Jefferson Papers)
building materials; cement, Roman [index entry] cement; Roman [index entry]
3Bernard Peyton to Thomas Jefferson, 21 February 1822 (Jefferson Papers)
building materials; cement, Roman [index entry] cement; Roman [index entry]
4Bernard Peyton to Thomas Jefferson, 19 August 1822 (Jefferson Papers)
building materials; cement, Roman [index entry] cement; Roman [index entry]