HMS Boreas (1757) and (20 guns) to intercept a French convoy in the Windward Passage. After sighting the five French vessels on the morning of 17 October, the British gave chase. Light winds slowed the chase so it was evening before "Boreas" could engage the 32-gun frigate "Sirène". French fire disabled "Boreas" aloft with the result that "Boreas" could not engage "Sirène" again until the following afternoon. "Boreas" emerged victorious from the engagement, capturing "Sirène", which suffered about 80 men killed and wounded, most of whom died later; "Boreas" lost only one man killed and one wounded. The French 20-gun corvette "Valeur", struck
HMS Boreas (1757) of action." Further, the sides of the vessel above the level of the deck were too low, leaving the crew exposed to enemy fire should "Boreas" run alongside an opposing ship. Boyle's concerns went unheeded, and "Boreas" was put to sea in early 1758. In April she assisted in the capture of the 36-gun French frigate "Diane". Boyle then sailed her to America on 21 June 1758 and she was subsequently involved in the operations off Louisbourg that year. "Boreas" shared in the proceeds of the capture of the merchantman "Foudroyant" and the schooner "Two Brothers", captured off Louisbourg. She