1Christopher Clark to Thomas Jefferson, 2 November 1815 (Jefferson Papers)
altitude; calculations for Peaks of Otter [index entry]
2Alden Partridge to Thomas Jefferson, 23 November 1815 (Jefferson Papers)
altitude; calculations for Peaks of Otter [index entry]
3George Wyche to Thomas Jefferson, 28 October 1818 (Jefferson Papers)
altitude; calculations for Peaks of Otter [index entry]