1Thomas Jefferson to Isaac McPherson, 13 August 1813 (Jefferson Papers)
Prony, Gaspard Clair François Marie Riche de; Nouvelle Architecture Hydraulique [index entry]
2Thomas Cooper to Thomas Jefferson, 31 May 1814 (Jefferson Papers)
Prony, Gaspard Clair François Marie Riche de; Nouvelle Architecture Hydraulique [index entry]