1Ennion Williams: List of claims for improvements at Monticello, 19 Sept. 1822, 19 September 1822 (Jefferson Papers)
Emmion Williams’s Claims for Improvements 1. A semicircular Instrument— Radius—12 Inches—Needle...
2To Thomas Jefferson from Ennion Williams, 13 January 1823 (Jefferson Papers)
Being desirous of promoting the Interest of the University, I called upon our friend Bernard...