The _Gannet_ first sailed through the Straits of Gibraltar to the Mediterranean Sea, for the purpose of keeping an eye on the Algerine rovers, who had again begun, in spite of the sharp lesson taught them by Admiral Blake, to molest peaceful traders.  From the Mediterranean we sailed across the Atlantic to the Indies, to make our headquarters the town of Port Royal in Jamaica, an island that Penn and Venables had seized from the Spaniards some five years before.