1John Adlum to Thomas Jefferson, 15 February 1810 (Jefferson Papers)
agriculture; and insects [index entry]
2James Madison to Thomas Jefferson, 2 July 1810 (Jefferson Papers)
agriculture; and insects [index entry]
3Samuel R. Demaree to Thomas Jefferson, 13 February 1814 (Jefferson Papers)
agriculture; and insects [index entry]
4Isaac A. Coles to Thomas Jefferson, 9 March 1816 (Jefferson Papers)
agriculture; and insects [index entry]
5Philadelphia Society for Promoting Agriculture to Thomas Jefferson, 13 November 1816 (Jefferson Papers)
agriculture; and insects [index entry]
6Enclosure: Petty Vaughan’s Notes on Rutabaga (Swedish Turnip), 29 March 1819, enclosure number 1 in Petty Vaughan to … (Jefferson Papers)
agriculture; and insects [index entry]
7William Oliver Vaughan to Thomas Jefferson, 25 April 1819 (Jefferson Papers)
agriculture; and insects [index entry]