This Day a Man arrived here from Witch Casset, and informs, That last Sunday he was on board the Boston frigate, Hector M'Neal Esq: Commander, who was then at Anchor in that Harbour. Capt. M'Neal informs, that four Weeks ago, Commodore Manly fell in with the Fox Frigate of 28 Guns, and after an Engagement of 4 Hours, the Fox was obliged to strike to Commodore Manly; who lost eight of his Men in the Engagement. Capt. M'Neal has on board the Boston all the Officers and part of the Men, the Officers are landed at the Eastward, and the Men (except four or five) are enter'd on board the Boston. Capt. M'Neal parted with Commodore Manly and the Prize, off of Cape Sables, last Saturday was a Week. — Commodore Manly had taken seven Fishermen, four of which he burnt, sent two into Port, and gave one to the Prisoners.