1Louis Philippe Gallot de Lormerie to Thomas Jefferson, 14 April 1809 (Jefferson Papers)
agriculture; American Board of Agriculture [index entry]
2Thomas Jefferson to Elkanah Watson, 8 May 1817 (Jefferson Papers)
agriculture; American Board of Agriculture [index entry]
3James Le Ray de Chaumont to Thomas Jefferson, 31 July 1818 (Jefferson Papers)
agriculture; American Board of Agriculture [index entry]