L, M-Ar, Mass. Archives Collection, vol. 205 (2d ser., Revolution Letters, 1775–1783), fols. 346–47. Addressed at top: “Messrs Wm. & Godfrey Hutchinson.” Docketed: “Messrs: Wm: & Godfrey/Hutchinson—/Letter May 15th. 1778/Entd:." There is a letter book copy of this letter in M-Ar, Mass. Archives Collection, vol. 151 (Letters from the Board of War, 1776–1780), p. 178.