1Thomas Cooper to Thomas Jefferson, 14 September 1810 (Jefferson Papers)
Sidmouth, Henry Addington, Viscount; British prime minister [index entry]
2Thomas Jefferson to Thomas Law, 15 January 1811 (Jefferson Papers)
Sidmouth, Henry Addington, Viscount; British prime minister [index entry]
3Thomas Jefferson to James Maury, 25 April 1812 (Jefferson Papers)
Sidmouth, Henry Addington, Viscount; British prime minister [index entry]
4Thomas Jefferson to Sir John Sinclair, 31 July 1816 (Jefferson Papers)
Sidmouth, Henry Addington, Viscount; British prime minister [index entry]