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 VASCO DA GAMA 141 Every year he sent out two or three. Navigators and geographers flocked to his service. In two years he re-discovered Madeira and Porto Santo, of which latter he afterward made Perestrello, the father of Columbus's wife, the governor. By 1433 his ships had reached Cape Bojador ; eight years afterward they passed Cape Blanco ; in 1445 they were at the mouth of the Senegal. Still he urged them on toward that " thesaurus Arabum ct divitia Indies" to which he set him- self the task of opening up the way. The crown of Portugal assumed all the cost of these expeditions. Gold, ivory, cinnabar, dye-woods, spices, and slaves, added to the wealth of the kingdom only to furnish forth new ventures. He died before the end came, but not until many of the most important prob- lems of cosmographic condition had been solved. It was known by actual expe- rience that the " steaming sea " was a myth. Ships had crossed the equator, and their crews came back to tell of southward-stretching shadows. Ships were able, it was seen, to sail up the southern slope of the world as well as down it. Why they did not fall off into space, none knew, but that they did not was proved. Gravitation was a force whose laws and character were yet unformulated. The di- urnal motion of the earth was hardly suspected until a hundred years later. But the facts on which these two fundamental truths are based were being gathered for Newton and Copernicus. When he died, those whom he had inspired and in- structed continued the work to which he had devoted himself, under the patron- age of his brother Alfonso and his nephew Joao II.; until, in 1486, Bartholomeo Diaz had sailed two hundred miles to the eastward of the Cape of Good Hope and returned to assure his sovereign that the way to India had at length been found. It was not, however, until Dom Manoel had succeeded to the throne, in 1495, that any successful effort was made to follow up the success which Diaz had achieved. The way to India was indeed open, but no one seems to have had sufficient fortitude to undertake so long a voyage in order to reach it by that route. Dom Manoel had, however, but one idea. He was not a geographer like his predecessor, Joao, " the perfect," but he was a man of action, and determined that the route Prince Henry's navigators had opened to India should not remain unused. Vasco da Gama was then in his thirty-fifth year, the handsomest man of his age, of ancient family, and it is claimed was not without royal blood in his veins. As a soldier he was trained in the war with Castile ; as a navigator he had served under Prince Henry's best captains. Camoens, the historical poet of Por- tugal, declares that he was familiar not only with the recorded achievements of his predecessors, but with all the regions they had discovered. Dom Joao, on the return of Diaz, selected him to command the fleet he meant to send to fol- low up this discovery. In the ten years that elapsed before he actually sailed, it is probable that he had grown to be not only a better geographer, but also a stronger, more cool-headed, and reliable man. That he was able to command, those mutineers who cavilled at his severity during the stormy passage of four months from Lisbon to Table Bay, found out when they demanded that he give up trying to reach India and return to Portugal as other captains had done, at the behest of their crews. He made short work of them, and in his whole ca-