11Thomas Jefferson to George Hargraves, 29 August 1814 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
12Thomas Jefferson to William Wirt, 5 August 1815 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
13Alden Partridge to Thomas Jefferson, 6 September 1815 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
14Enclosure: Alden Partridge’s Table of Altitudes of Northern Mountains, [before 6 September 1815] (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
15Thomas Jefferson to William Steptoe, 13 September 1815 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
16Enclosure: Alden Partridge’s Table of Altitudes of the Blue Ridge and Allegheny Mountains, [by 5 November 1810] (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
17Caspar Wistar to Thomas Jefferson, 20 May 1817 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
18John Vaughan to Thomas Jefferson, 2 June 1817 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
19Thomas Jefferson to Caspar Wistar, 10 June 1817 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]
20John Vaughan to Thomas Jefferson, 18 June 1817 (Jefferson Papers)
American Philosophical Society; Transactions [index entry]