Charles V., King of Spain, seems to have been quite alive to the importance of these canal projects. In 1534 he directed the Governor of Costa Firme, the old name for the Panama district, to survey the valley of the Chagres, the river which supplies the water for the upper reaches of the American canal. This gentleman, however, seems scarcely to have shared the royal enthusiasm. He may be supposed to have known the isthmus at these points very well, and his scepticism about the prospect of canal construction there in those days was not wholly groundless. The Spanish historian Gomara, who wrote a history of the Indies in 1551 and dedicated it to Charles V., declared a canal to be quite feasible along any of the four routes mentioned by Galvano. It is true he recognized obstacles. "There are mountains," he wrote, "but there are also hands. If determination is not lacking, means will not fail; the Indies, to which the way is to be made, will furnish them. To a king of Spain, seeking the wealth of Indian commerce, that which is possible is also easy." But Charles V. died without making any practical advance in this enterprise, and a rather remarkable reaction took place under his successor, Philip II. It should be noted that by this time a permanent roadway had been established across the isthmus from Panama to Porto Bello, along which the Spanish treasure-convoys passed from sea to sea without much interruption. The rapidly growing power of the English at sea made Philip fear that, if a canal were built, he would be unable to control it, and would probably lose his existing monopoly of isthmian transit. So he issued a veto against all projects of canal construction. He even persuaded himself that it would be contrary to the Divine purpose to link together two great oceans which God had set asunder, and that any such attempt would be visited by a terrible nemesis.[2] So his Majesty not only forbade all such schemes but declared the penalty of death against any one who should attempt to make a better route across Central America than the land-route between Panama and Porto Bello. In course of time the king's beard was so horribly singed by English navigators and adventurers in the Caribbean Sea that the Atlantic end of the overland trail became almost useless, and the Spanish argosies were compelled to sail homewards round the far Magellan Straits. But in 1579, as we have seen, Sir Francis Drake ("El Draque" as he was called by the terrified Spaniards) had suddenly attacked, captured, and scattered the Spanish ships off the Pacific coast of South America. So the isthmian land-route was once more resumed, and it took the Spaniard all his time to hold that open.