1Thomas Jefferson to John Langdon, 5 March 1810 (Jefferson Papers)
Frederick II (“the Great”), king of Prussia; mentioned [index entry]
2John Adams to Thomas Jefferson, 28 June 1813 (Jefferson Papers)
Frederick II (“the Great”), king of Prussia; mentioned [index entry]
3John Adams to Thomas Jefferson, with postscript by Abigail Adams, 20 June 1815 (Jefferson Papers)
Frederick II (“the Great”), king of Prussia; mentioned [index entry]
4John Adams to Thomas Jefferson, 24 August 1815 (Jefferson Papers)
Frederick II (“the Great”), king of Prussia; mentioned [index entry]
5John Adams to Thomas Jefferson, 6 May 1816 (Jefferson Papers)
Frederick II (“the Great”), king of Prussia; mentioned [index entry]
6Thomas Jefferson’s Notes on Early Career (the so-called “Autobiography”), [6 January–29 July 1821], with editorial note … (Jefferson Papers)
Frederick II (“the Great”), king of Prussia; mentioned [index entry]