1Joseph Dougherty to Thomas Jefferson, 28 December 1809 (Jefferson Papers)
books; published by J. Milligan [index entry]
2Joseph Milligan to Thomas Jefferson, 3 February 1810 (Jefferson Papers)
books; published by J. Milligan [index entry]
3William F. Gray to Thomas Jefferson, 18 May 1811 (Jefferson Papers)
books; published by J. Milligan [index entry]
4Joseph Milligan to Thomas Jefferson, 4 June 1816 (Jefferson Papers)
books; published by J. Milligan [index entry]
5Joseph Milligan to Thomas Jefferson, 6 February 1818 (Jefferson Papers)
books; published by J. Milligan [index entry]