“Lewis Littlepage to Benjamin Franklin, 12 February 1780,” Founders Online, National Archives, https://founders.archives.gov/documents/Franklin/01-31-02-0346. [Original source: The Papers of Benjamin Franklin, vol. 31, November 1, 1779, through February 29, 1780, ed. Barbara B. Oberg. New Haven and London: Yale University Press, 1995, pp. 476–477.]
“Philip Mazzei to James Madison, 30 November 1780,” Founders Online, National Archives, https://founders.archives.gov/documents/Madison/01-02-02-0121. [Original source: The Papers of James Madison, vol. 2, 20 March 1780 – 23 February 1781, ed. William T. Hutchinson and William M. E. Rachal. Chicago: The University of Chicago Press, 1962, pp. 211–216.]