“Enclosure: Drawing of a Mill for Sawing and Polishing Stone, 13 December 1792,” Founders Online, National Archives, https://founders.archives.gov/documents/Jefferson/01-24-02-0718. [Original source: The Papers of Thomas Jefferson, vol. 24, 1 June–31 December 1792, ed. John Catanzariti. Princeton: Princeton University Press, 1990, p. 732.]