John Foster Williams (12 October 1743 – 24 June 1814) was an American mariner who served as an officer in the Massachusetts State Navy during the American Revolutionary War and later an officer in the Revenue-Marine. Career Williams was commissioned a captain in the Navy of Massachusetts and received command of the brig Hazard late in 1777. In the following year, he took her to sea in a fruitless search for British West Indiamen; but he and his ship eventually achieved success in 1779. While cruising in the West Indies, Hazard fell in with the privateer brigantine Active on 16 March. At the end of a "smart action" of 35-minutes' duration, "yard arm to yard arm," Active struck her colors and became Hazard's prize, after having suffered 13 killed and 20 wounded out of her 95-man crew. Hazard sent the captured brigantine back to Massachusetts under a prize crew and subsequently returned home in April, after taking several other prizes. In May, Hazard returned to sea, this time in company with the brig Tyrannicide. At 0830 on 15 June, the two ships fell in with two British ships and—after a short, sharp engagement—forced both enemy vessels to strike their colors. Later that summer, Hazard—like the rest of the Massachusetts Navy—took part in the ill-fated Penobscot expedition, an operation which eventually cost the state's navy all of its commissioned vessels. Williams received command of the new 20 gun frigate Protector in the spring of 1780 and took her to sea in June. In accordance with instructions from the Board of War, the new warship cruised in the vicinity of the Newfoundland Banks, on the lookout for British merchantmen. Her vigilance was rewarded early in June. At 0700 on 9 June 1780, Protector spotted a strange ship bearing down on her, flying British colors. At 1100, the Continental frigate, also flying English colors, hailed the stranger and found her to be the 32-gun letter-of-marque Admiral Duff, bound for London from St. Kitts. When the enemy's identity had been ascertained, Protector hauled down British colors and ran up the Continental flag—opening fire almost simultaneously. The action ensued for the next hour and one-half, until Admiral Duff caught fire and exploded, leaving 55 survivors for Protector to rescue soon thereafter. With the coming of peace, Williams returned to his native Boston. Because of rampant smuggling and the need for enforcement of tariff laws, upon