1Isaac Briggs to Thomas Jefferson, 16 February 1816 (Jefferson Papers)
Briggs, Isaac; letters from [index entry]
2Isaac Briggs to Thomas Jefferson, 30 March 1816 (Jefferson Papers)
Briggs, Isaac; letters from [index entry]
3Isaac Briggs to Thomas Jefferson, 7 May 1816, with Postscript by Mary B. Briggs (Jefferson Papers)
Briggs, Isaac; letters from [index entry]
4Isaac Briggs to Thomas Jefferson, 9 May 1817 (Jefferson Papers)
Briggs, Isaac; letters from [index entry]
5Isaac Briggs to Thomas Jefferson, 15 May 1817 (Jefferson Papers)
Briggs, Isaac; letters from [index entry]
6Isaac Briggs to Thomas Jefferson, 21 May 1817 (Jefferson Papers)
Briggs, Isaac; letters from [index entry]
7Isaac Briggs to Thomas Jefferson, 17 November 1817 (Jefferson Papers)
Briggs, Isaac; letters from [index entry]