“To Benjamin Franklin from James Logan, 11 June 1749,” Founders Online, National Archives, https://founders.archives.gov/documents/Franklin/01-03-02-0153. [Original source: The Papers of Benjamin Franklin, vol. 3, January 1, 1745, through June 30, 1750, ed. Leonard W. Labaree. New Haven: Yale University Press, 1961, p. 380.]