1Bernard Peyton to Thomas Jefferson, 19 March 1816 (Jefferson Papers)
Peyton, Bernard; and gypsum for TJ [index entry]
2Bernard Peyton to Thomas Jefferson, 27 March 1816 (Jefferson Papers)
Peyton, Bernard; and gypsum for TJ [index entry]
3Bernard Peyton to Thomas Jefferson, 10 November 1817 (Jefferson Papers)
Peyton, Bernard; and gypsum for TJ [index entry]
4Bernard Peyton to Thomas Jefferson, 21 January 1819 (Jefferson Papers)
Peyton, Bernard; and gypsum for TJ [index entry]