were portending: the Ottoman Turks, pressing upon the Greek Empire from Asia Minor and the Balkan Peninsula, were already well advanced upon their career of blighting conquest which was destined to throw Christendom upon the defensive for more than two centuries. At the opening of the fifteenth century, although the trade routes had not been closed by the Turks, the Drang nach Osten--the hope of cutting through the Moslem barrier in order to establish direct connection with India--was at an end. Unless a new way to the East could be found, the better part of the treasure of the Orient was lost to Europe.
IV
Long before the fifteenth century many men had thought it possible to reach India by sailing around Africa. Since classical times geographers had both asserted and denied the possibility. During the Middle Ages the Ptolemaic theory was in the ascendant; but the observations of thirteenth-century travelers gave powerful support to the ideas of Eratosthenes. Europeans who had sailed from Malacca to Hormos, or had read the book of Marco Polo or Friar Oderic, knew well that no impenetrable swamp guarded the southern approaches to Asia; while those who had seen or heard of Arab ships clearing from Calicut for Aden could scarcely avoid the inference that a wider sweep to the south might have brought the same ships to Lisbon or Venice.
This inference, the alert and practical Italian intellect, unhampered by scientific tradition or ecclesiastical prejudice, had unhesitatingly drawn. The famous Laurentian Portolano, a sailing chart constructed in 1351, was precisely such a map as Marco Polo, had he turned cartographer, might have drawn: the first map in which Africa appears familiar to modern eyes; with the point of the continent foreshortened, and the Atlantic and Indian Oceans joined at last, it held out to all future explorers the prospect of successful voyages from Venice to Ceylon. Sixty years earlier, even before Polo returned from China, the heroic attempt had been made; Tedisio Doria and the Vivaldi, venturous Genoese seamen, passing the Rock of Gibraltar, pointed their galleys to the south in order "to go by sea to the ports of India to trade there." They never returned, nor were ever heard of beyond Cape Non in Barbary, but the memory of their hapless venture was perpetuated in legends of the fourteenth century which credited them with sailing "the sea of Ghinoia to the City of Ethiopia."
To go by sea to the ports of India was an undertaking not to be achieved by unaided Italian effort, or in a single generation. The skill and daring of many captains might find the way, but discovery was futile unless backed by conquest, for which the support of a powerful government was essential. Not from Italian states, weak and distracted by inter-city wars, or absorbed in established and profitable Levantine trade, was such support to come, but from the rising nations of the Atlantic, which profited least by the established commercial system. Lying at the extreme end of the old trade routes, the merchants of France, England, Spain, and Portugal were mulcted of the major profits of Oriental trade. Here prices were lowest and money most scarce. Yet the future of these countries, consolidated under centralized monarchies in alliance with a moneyed class, depended upon a full royal treasury and thriving industry. "The king," said Cardinal Morton, addressing the English Commons, "wishes you to arrest the drain of money to foreign countries. The king wishes to enrich you; you would not wish to make him poor. Consider that the kingdoms which surround us grow constantly stronger, and that it cannot be well that the king should find himself with an empty treasury." To replenish the royal treasury by enriching the bourgeois class was the basic motive which enlisted the Western monarchs in maritime exploration and discovery.
Yet not to the greater states of the West was reserved the honor of first reaching the Indies by sea. The Kingdom of Portugal, first to venture, was first to reach the goal. Looking out over Africa and the South Atlantic, effectively consolidated under King John of Good Memory while its neighbors were still involved in foreign wars or the problems of internal organization, the little state enjoyed advantages denied to England before the accession of Henry Tudor, or to Spain before the conquest of Granada. And to these advantages the fates added another, and greater. For at an opportune moment it was given to Portugal to possess one of those great souls, of lofty purpose and enduring resolution, whose fortune it is to gather the scattered energies of many men and with patient wisdom direct them to the attainment of noble ends. To Prince Henry the Navigator, who raised the endeavors of the nation to the level of an epic achievement, it is chiefly
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