For more than three centuries the trading nations of Europe were suffered to pursue their commerce or forced to abandon their gains at the bidding of pirates. From the days when Barbarossa defied the whole strength of the Emperor Charles V., to the early part of the present century, when prizes were taken by Algerine rovers under the guns, so to say, of all the fleets of Europe, the Corsairs were masters of the narrow seas, and dictated their own terms to all comers.