There was thus much promise that Osorio would prove to be an energetic and useful governor. Unfortunately, at the very beginning of his administration he came into conflict with another and much stronger functionary of the Spanish crown; indeed, one of the most formidable figures of the time. This was none other than Pedro Menendez de Aviles, whose record fills so large a place in the early annals of Florida and the West Indies. He took to the sea in boyhood, and became one of the most expert navigators of Spain. At the age of thirty he was captain of his own ship, and it was one of the most active and efficient vessels among all that guarded and convoyed the treasure ships and fleets of the Spanish Main. At that time he warned the government of Hispaniola and also that of Mexico of the grave danger of letting the French get any foothold upon those shores, or even of navigating those waters. The Bahama Channel, the Gulf of Mexico and the Caribbean Sea should all, he insisted, be declared and kept closed seas, into which no vessels but those of Spain should enter save by special license. [Illustration: PEDRO MENENDEZ DE AVILES.] Menendez was, moreover, an ardent and indeed fanatical Catholic, who deemed it a duty to extirpate "Lutheran dogs," as he termed the French Huguenots and other Protestants; and as most of the French seamen and foreign adventurers at that time were of the Huguenot faith, he cherished a special animosity against them. Now, his recommendations to the governments of Hispaniola and Mexico were transmitted to Seville and were laid before the King. Charles was at that time weary of royal cares and was about to resign them, and he paid little or no attention to the letters of the young captain. But when Philip II came to the throne, attention was given to them. That painstaking monarch read them and was much struck by them, both in their warning of military danger from the French and in their zealous animosity against heretics. Their writer was evidently, he thought, a man after his own heart. So he sent for Menendez, talked with him, and commissioned him to be the guardian of the highway to the Indies, with the title of captain-general. It was his function to guard Spanish treasure ships all the way across the Atlantic, from Mexico to Spain, as he had formerly guarded them in the narrow seas about the Indies. It was thus that he was serving during a part of Mazariegos's administration in Cuba, and in that capacity he spent much time at Havana. On one or two occasions he took charge of the few little vessels which formed Mazariegos's navy, and did good service with them. At this time, also, he wrote to the King about the increasing ravages and peril of French privateers in those waters, very much as he had written to the local governments years before.