1Thomas Jefferson to Joseph Echols, 23 May 1822 (Jefferson Papers)
Astronomy explained upon Sir Isaac Newton’s principles (J. Ferguson) [index entry]
2Enclosure: Thomas Jefferson’s Supplemental List of Recommended Books, [ca. 4 October 1809] (Jefferson Papers)
Astronomy explained upon Sir Isaac Newton’s principles (J. Ferguson) [index entry]
3Enclosure: Thomas Jefferson’s List of Recommended Books, [ca. 4 October 1809] (Jefferson Papers)
Astronomy explained upon Sir Isaac Newton’s principles (J. Ferguson) [index entry]
4Enclosure: Thomas Jefferson’s Statement of Account with the Estate of Bathurst Skelton, [ca. 11 June 1810] (Jefferson Papers)
Astronomy explained upon Sir Isaac Newton’s principles (J. Ferguson) [index entry]
5Thomas Jefferson to John Minor, 30 August 1814, including Thomas Jefferson to Bernard Moore, [ca. 1773?] (Jefferson Papers)
Astronomy explained upon Sir Isaac Newton’s principles (J. Ferguson) [index entry]