sentences:  When Bellamy double-crossed Jennings, Jennings' ruthlessness was evidenced in the brutal slaying of more than 20 Frenchmen and Englishmen, and the burning of an innocent Englishman's merchant sloop.In April 1716, he captured the French vessel "Marianne".During the attack, he fired the "Bersheba's" Great Gun himself, easily taking the ship.