I have corrected the paragraphs in Leeds History on what I have discovered so far
This vessel, the British Frigate Fox was captured on 7 June 1777 by the American ship Black Prince Boston, commanded by Hector McNeil with Richard Benjamin Crowninshield on board as a midshipman. He and his shipmates were confined in irons and nearly devoured by lice. On application to the commodore, who was moved with sympathy for the youth, his shackles were removed and permission given him to mingle and labor with the sailors of the Black Prince Boston who manned the captured man-of-war vessel and took her into an American port (presumably Boston), where they landed in May 1778.
The succeeding fall, this vessel the Black Prince, with Nathaniel West as Captain, was impressed into the American service, sent to the Maine coast to aid in driving the Bristish from the Peneobscot, and young Francis, having sworn allegiance to the cause of America, acted in the capacity of “captain of the top” in the engagement at Castine that soon followed, in which this vessel was an active participant. Soon after this engagement, having proceeded up the Penobscot River to near where the city of Bangor is now situated, and being hemmed in and pursued by a superior force of Red Coats, the vessel was abandoned, blown up and sunk in that river. (p56 – Leeds History)
