1John Adams to Thomas Jefferson, 16 July 1814 (Jefferson Papers)
German language; study of [index entry]
2Thomas Cooper to Thomas Jefferson, 15 September 1814 (Jefferson Papers)
German language; study of [index entry]
3George Ticknor to Thomas Jefferson, 10 August 1818 (Jefferson Papers)
German language; study of [index entry]
4George Blaettermann to Thomas Jefferson, 27 April 1819 (Jefferson Papers)
German language; study of [index entry]
5John Hyder to Thomas Jefferson, 14 July 1820 (Jefferson Papers)
German language; study of [index entry]
6Thomas Jefferson to John Adams, 15 August 1820 (Jefferson Papers)
German language; study of [index entry]
7Frederick D. Tschiffely to Thomas Jefferson, [received 19 July 1822] (Jefferson Papers)
German language; study of [index entry]