Although every thing promised fair to John in the war of Africa, yet it early occurred to prince Henry, that a small kingdom like Portugal never could promise to do any thing effectual against the enormous power of the Mahometans, then in possession of extensive dominions in the richest parts of the globe. The sudden rise of Venice was before his eyes, and almost happened in his own time. By applying to trade alone, she had acquired a power sufficient to cope with the stoutest of her enemies. Portugal, small as it was, merited quite another degree of respect; but poverty, ignorance, pride, and idleness prevailed among the poor people; even agriculture itself was in a manner abandoned since the expulsion of the Moors.
Prince Henry, from his early years, had been passionately addicted to the study of what is generally known by the name of mathematics, that is, geometry, astronomy, and consequently arithmetic. He was of a liberal turn of mind, devoid of superstition, haughtiness, or passion; the Arab and the Jew were admitted to him with great freedom, as the only masters who were capable of instructing him in those sciences. It was in vain to attempt to rival Venice in possession of the Mediterranean trade: no other way remained but to open the commerce to India by the Atlantic Ocean, by sailing round the point of Africa to the market of spices in India. Full of this thought, he retired to a country palace, and there dedicated the whole of his time to deliberate inquiry. The ignorance and prejudices of the age were altogether against him. The only geography then known was that of the poets. It was the opinion of the Portuguese, that the regions within the tropics were totally uninhabited, scorched by eternal sun-beams, while boiling oceans wasted these burning coasts; and, therefore, they concluded, that every attempt to explore them was little better than downright madness, and a braving, or tempting, of Providence.
But, on the other hand, he found great materials to comfort him, and to make him persist in his resolution. For Greek history, to which he then had access, had recorded two instances, which shewed that the voyage was not only possible, but that it had been actually performed, first by the Phœnicians, under Necho king of Egypt, then by Eudoxus, during the time of Ptolemy Lathyrus, who, after doubling the southern Cape of Africa, arrived in safety at Cadiz. Hanno, too, had sailed from Carthage through the Straits, and reached to 25° of north latitude in the Atlantic Ocean. In more modern times, even in the preceding century, Macham, an Englishman, returning from a voyage on the west coast of Africa, was shipwrecked on the island of Madeira, together with a woman whom he tenderly loved. After her death he became weary of solitude; and having constructed a bark, or canoe, with which he paddled over to the opposite coast, he was taken by the natives, and presented to the Caliph as a curiosity. And the Normans of Dieppe had, as a company, traded in 1364, not fourscore years from prince Henry’s time, as far as Sierra de Leona, only 7° from the Line.
The prince’s humanity to his Moorish prisoners had likewise been rewarded by substantial information; they reported that some of their countrymen of the kingdom of Sus had advanced far into the desert, carrying their water and provisions along with them on camels; that, after many days travel, they came to mines of salt, and, having loaded their cargoes, they proceeded till they came within the limits of the rains; there they found large and populous towns, inhabited by a people totally black and woolly-headed, who reported that there were many countries even beyond them, occupied by numerous and warlike tribes. To complete all, Don Pedro, Henry’s brother, returning from Venice, brought along with him from that city a map, on which the whole coast of the Atlantic Ocean was distinctly traced, and the southern extremity of Africa was represented to be a cape surrounded with the sea, which joined with the Indian Ocean.
No sooner was the prince thus satisfied of the possibility of a passage to India round Africa, than he set about constructing the necessary instruments for navigation. He corrected the solar tables of the Arabs, and made some alterations in the astrolabe: For, strange to tell! the quadrant was not then known in Portugal, though, a hundred years before, Ulughbeg had measured the sun’s height at Samarcand in Persia, with a quadrant of about 400 feet radius, the largest ever constructed, if, indeed, the size of this be not exaggerated.
Henry, who, by his liberality and affability, had drawn together the most learned mathematicians and ablest pilots of the age, now proposed to reduce his speculations to practice. Many ships had sailed in the course of his disquisitions, and ten years had now elapsed before the prince, after all his encouragement, could induce the captains to proceed farther than Cape Non, or, thirty leagues further, to Cape Bojador. To this their courage held good; after which, the fear of fiery oceans reviving in their minds, they returned exceedingly satisfied with their own perseverance and abilities. Henry, though greatly hurt at this behaviour, dissembled the low opinion which he had formed of both. He contented himself with proposing to them different reasons and rewards; and urged them to repeat their voyages, which, however, constantly ended in the same disappointment. And it is probable a much longer time might have been spent in these miscarriages, had not accident, or rather providence, stept in to his assistance.
John Gonsalez, and Tristan Vaz, two gentlemen of his bed-chamber, seeing the impression this behaviour had made on the prince, and having obtained a small ship from him, resolved to double Cape Bojador, and discover the coast beyond it. Whether the fiery oceans might not have presented themselves to these gentlemen, I know not; but a violent storm forced them to sea. After being tossed about in perpetual fear of shipwreck for several days, they at last landed on a small island, which they called Port Santo. These two navigators possessed the true spirit of discovery. Far from giving themselves up for lost in a new world, or content with what they had already done, they set about making the most diligent observation of every thing remarkable in this small spot. The island itself was barren; but, examining the horizon all around, they observed a black fixed spot there, which never either changed its place or dimensions. Satisfied, therefore, that this was land, they returned to the Infant with the news of this double discovery.
Three vessels were speedily equipped by the prince; two of them given to Vaz and Arco, and the third to Bartholomew Perestrello, gentleman of the bed-chamber to Don John his brother. These adventurers were far from disappointing his expectations; they arrived at Port Santo, and proceeded to the fixed spot, which they found to be the island of Madeira, wholly covered with wood; an island that has ever since been of the greatest use to the trade of both Indies, and which has remained to the crown of Portugal, after the greatest part of their other conquests in the east are lost. John I. was now dead, and Edward had succeeded him. The infant Henry, however, still continued the pursuit of his discoveries with the greatest ardour.
Giles D’Anez, stimulated by the success of the last adventures, put to sea with a resolution to double Cape Bojador close in shore, so as to make his voyage a foundation for pushing farther the discovery; and, being lucky in good weather, he fairly doubled the Cape; and, continuing some leagues farther into the bay to the south of it, he returned with the same good fortune to Portugal, after having found the ocean equally as navigable on the other side as on this; and that there was no foundation for those monstrous appearances or difficulties mariners till now had expected to find there.
The successful expedition round Cape Bojador being soon spread abroad through Europe, excited a spirit of adventure in all foreigners; the most capable of whom resorted immediately to prince Henry, from their different countries, which further increased the spirit of the Portuguese, already raised to a very great height. But there still was a party of men, who, not susceptible of great actions themselves, dedicated their time with some success to criticising the enterprises of others. These blamed prince Henry, because, when Portugal was exhausted both of men and money by a necessary war in Africa, he should have chosen that very time to launch out into expences and vain discoveries of countries, in an immense ocean, which must be useless, because incapable of cultivation. And though they did not advance, as formerly, that the ocean was boiling among burning sands, they still thought themselves authorised to assert, that these countries must, from their situation under the sun, be so hot as to turn all the discoverers black, and also to destroy all vegetation. Futile as these reasons were, at another time they would have been sufficient to have blasted all the designs of prince Henry, had they made half the impression upon the king that they did upon the minds of the people. Portugal was then only growing to the pitch of heroism to which it soon after arrived, their spirit being continually fostered by a long succession of wise, brave, and well-informed princes.