1Peter Poinsot to Thomas Jefferson, 25 June 1817 (Jefferson Papers)
Barnet, Isaac Cox; as consul [index entry]
2Peter Poinsot to Thomas Jefferson, 18 May 1818 (Jefferson Papers)
Barnet, Isaac Cox; as consul [index entry]
3Peter Poinsot to Thomas Jefferson, 12 September 1818 (Jefferson Papers)
Barnet, Isaac Cox; as consul [index entry]
4Peter Poinsot to Thomas Jefferson, 2 March 1819 (Jefferson Papers)
Barnet, Isaac Cox; as consul [index entry]
5Peter Poinsot to Thomas Jefferson, 6 June 1819 (Jefferson Papers)
Barnet, Isaac Cox; as consul [index entry]