1Alden Partridge to Thomas Jefferson, 9 January 1818 (Jefferson Papers)
I take the liberty to enclose you a number of Altitudes , which I calculated in the month of...
2Enclosure: Alden Partridge’s Notes on Altitudes of Mountains, 20 August 1817 (Jefferson Papers)
feet Altitude of Ascutney Mountain above the Sea 3320— Altitude of the same above Connecticutt...
3Alden Partridge to Thomas Jefferson, 20 February 1818 (Jefferson Papers)
In examining—a few days ago— the Calculations of the heights I last sent you , I found I had a...