The Sea-Hawk by Rafael Sabatini

How it came to happen that Sakr-el-Bahr, the Hawk of the Sea, the Muslim rover, the scourge of the Mediterranean, the terror of Christians, and the beloved of Asad-ed-Din, Basha of Algiers, would be one and the same as Sir Oliver Tressilian, the Cornish gentleman of Penarrow, is at long length set forth in the chronicles of Lord Henry Goade. His lordship conveys to us some notion of how utterly overwhelming he found that fact by the tedious minuteness with which he follows step by step this extraordinary metamorphosis. He devotes to it two entire volumes of those eighteen which he has left us. The whole, however, may with advantage be summarized into one short chapter.

Sir Oliver was one of a score of men who were rescued from the sea by the crew of the Spanish vessel that had sunk the Swallow; another was Jasper Leigh, the skipper. All of them were carried to Lisbon, and there handed over to the Court of the Holy Office. Since they were heretics all -- or nearly all -- it was fit and proper that the Brethren of St. Dominic should undertake their conversion in the first place. Sir Oliver came of a family that never had been famed for rigidity in religious matters, and he was certainly not going to burn alive if the adoption of other men's opinions upon an extremely hypothetical future state would suffice to save him from the stake. He accepted Catholic baptism with an almost contemptuous indifference. As for Jasper Leigh, it will be conceived that the elasticity of the skipper's conscience was no less than Sir Oliver's, and he was certainly not the man to be roasted for a trifle of faith.