1William Lambert to Thomas Jefferson, 17 September 1809 (Jefferson Papers)
astronomy; study of [index entry]
2John Adams to Thomas Jefferson, 16 July 1814 (Jefferson Papers)
astronomy; study of [index entry]
3Thomas Jefferson to Peter Carr, 7 September 1814 (Jefferson Papers)
astronomy; study of [index entry]
4Thomas Cooper to Thomas Jefferson, 15 September 1814 (Jefferson Papers)
astronomy; study of [index entry]
5Thomas Cooper to Thomas Jefferson, 22 September 1814 (Jefferson Papers)
astronomy; study of [index entry]
6George Ticknor to Thomas Jefferson, 14 October 1815 (Jefferson Papers)
astronomy; study of [index entry]
7John Adams to Thomas Jefferson, 2 March 1816 (Jefferson Papers)
astronomy; study of [index entry]
8Thomas Jefferson to John Adams, 21 March 1819 (Jefferson Papers)
astronomy; study of [index entry]
9Thomas Jefferson to Francis Eppes, 6 October 1820 (Jefferson Papers)
astronomy; study of [index entry]
10Thomas Jefferson to Francis Eppes, 9 April 1822 (Jefferson Papers)
astronomy; study of [index entry]