Phillips, Michael. "Powerful (74)". Ships of the Old Navy. Retrieved 12 August 2021.
archives.gov
founders.archives.gov
"John Lyddiard to John Adams, 20 July 1785". Founders Online. National Archives. [Original source: The Adams Papers, Papers of John Adams, vol. 17, April–November 1785, ed. Gregg L. Lint, C. James Taylor, Sara Georgini, Hobson Woodward, Sara B. Sikes, Amanda A. Mathews, and Sara Martin. Cambridge, MA: Harvard University Press, 2014, pp. 261–262.]