“To George Washington from Lund Washington, 10 May 1779 [letter not found],” Founders Online, National Archives, https://founders.archives.gov/documents/Washington/03-25-02-0423. [Original source: The Papers of George Washington, Revolutionary War Series, vol. 25, 10 March–12 May 1780, ed. William M. Ferraro. Charlottesville: University of Virginia Press, 2017, p. 590.]