1Christopher Clark to Thomas Jefferson, 31 August 1815 (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
2Thomas Jefferson to Christopher Clark, 14 September 1815 (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
3Thomas Jefferson to Alden Partridge, 12 October 1815 (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
4Thomas Jefferson to Joseph Milligan, 27 October 1815 (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
5Thomas Jefferson to Christopher Clark, 2 November 1815 (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
6Christopher Clark to Thomas Jefferson, 2 November 1815 (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
7Thomas Jefferson to Christopher Clark, 5 November 1815 (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
8Thomas Jefferson’s Summary Comments on the Peaks of Otter, [before 2 December 1815] (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
9Thomas Jefferson’s Labeled Diagrams Related to Calculations of Altitude of the Peaks of Otter, [ca. 10–17 November 1815] (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]
10Thomas Jefferson’s Field Notes and Calculations of Altitude of the Peaks of Otter, [10–ca. 17 November 1815] (Jefferson Papers)
Peaks of Otter, Va.; altitude of [index entry]