About the year 1432, Gonzalos was sent with two small vessels to the coast of Africa on new discoveries. In 1434, Cape Boyada was doubled: in 1442, the Portuguese had advanced as far as Rio-do-Ouro, under the tropic of Cancer. On the return of the ships from this voyage, the inhabitants of Lisbon first saw, with astonishment, negroes of a jet black complexion, and woolly hair, quite different from the slaves which had been hitherto brought from Africa; for, before this time, they had seized, and sold as slaves, the tawny Moors, which they met with on the coast of Africa. In the year 1442, however, some of these had been redeemed by their friends, in exchange for negroes and gold dust. This last article stimulated the avarice of the Portuguese to greater exertions, than Prince Henry had been able to excite, and an African company was immediately formed to obtain it, slaves, &c.; but their commerce was exclusively confined to the coast of Africa, to the south of Sierra Leone. Dr. Vincent justly remarks, that Henry had stood alone for almost forty years, and had he fallen before these few ounces of gold reached his country, the spirit of discovery might have perished with him, and his designs might have been condemned as the dreams of a visionary. The importation of this gold, and the establishment of the African company in Portugal, to continue the remark of the same author, is the primary date, to which we may refer that turn for adventure which sprung up in Europe, which pervaded all the ardent spirits in every country for the two succeeding centuries, and which never ceased till it had united the four quarters of the globe in commercial intercourse.
In 1445, the Portuguese reached Senegal, where they first saw Pagan negroes: in 1448 and 1449, their discoveries extended to Cape Verd. The islands of that name were discovered in 1456. The exact extent of their discoveries from this time till 1463, when Prince Henry died, is not certainly known. According to some, Cape Verd, or Rio Grande, was the limit; according to others, one navigator reached as far as the coast of Guinea, and Cape Mesanado: some extend the limit even as far south as the equator. Assuming, however, Rio Grande as the limit of the discoveries made in Prince Henry's time, Rio Grande is in latitude 11 north, and the straits of Gibraltar in latitude 36 north; the Portuguese had therefore advanced 25 degrees to the south; that is 1500 geographical, or 1750 British miles, which, with the circuit of the coast, may be estimated at 2000 miles.
For nearly 20 years after the death of Prince Henry, little progress was made by the Portuguese in advancing to the south. At the time of the death of Alonzo, in 1481, they had passed the equator, and reached Cape St. Catherine; in latitude S. 2° 30'. The island of St. Thomas under the line, which was discovered in 1471, was immediately planted with sugar cane; and a fort, which was built the same year on the gold coast, enabled them to extend their knowledge of this part of Africa to a little distance inland. Portugal now began to reap the fruits of her discoveries: bees' wax, ostrich feathers, negro slaves, and particularly gold, were imported, on all of which the profits were so great, that John II., who succeeded Alonzo, immediately on his accession, sent out 12 ships to Guinea; and in 1483, two other vessels were sent, which in the following year reached Congo, and penetrated to 22° south. The river Zaire in this part of Africa was discovered, and many of the inhabitants of the country through which it flows embarked voluntarily for Portugal. Benin was discovered about the same time; here they found a species of spice, which was imported in great quantities into Europe, and sold as pepper: it was, however, nothing else but grains of paradise. The inhabitants of Benin must have had considerable traffic far into the interior of Africa, for from them the Portuguese first received accounts of Abyssinia. By the discovery and conquest of Benin and Congo, the Portuguese traffic in slaves was much extended, but at the same time it took another character for a short time; for the love of gold being stronger than the hope of gain they might derive from the sale of negroes, (for which, indeed, till the discovery of the West Indies there was little demand,) the Portuguese used to exchange the natives they captured for gold with the Moors, till John II. put an end to this traffic, under the pretence that by means of it, the opportunity of converting the negroes was lost, as they were thus delivered into the hands of Infidels. About eighty years after Prince Henry began his discoveries, John I. sent out Diaz with three ships: this was in 1486, and in the following year Covilham was sent by the same monarch in search of India, by the route of Egypt and the Red Sea.
The king displayed great judgment in the selection of both these persons. Diaz was of a family, several members of which had already signalized themselves by the discoveries on the coast of Africa. His mode of conducting the enterprize on which he was sent, proved at once his confidence in himself, his courage, and his skill; after reaching 24° south latitude, 120 leagues beyond any former navigator, he stood right out to sea, and never came within sight of the coast again, till he had reached 40 degrees to the eastward of the Cape, which, however, he was much too far out at sea to discover. He persevered in stretching still farther east, after he made land, till at length he reached the river Del Infante, six degrees to the eastward of the most southern point of Africa, and almost a degree beyond the Cape of Good Hope. He then resolved to return, for what reason is not known; and on his return, he saw the Cape of Good Hope, to which, on account of the storms he encountered on his passage round it, he gave the appellation of Cabo Tormentoso. John II., however, augured so well from the doubling of the extremity of Africa having been accomplished, that he changed its name into that of the Cape of Good Hope.
As soon as John II. ascended the throne, he sent two friars and a layman to Jerusalem, with instructions to gain whatever information they could respecting India and Prester John from the pilgrims who resorted to that city, and, if necessary, to proceed further to the east. As, however, none of this party understood Arabic, they were of little use, and in fact did not go beyond Jerusalem. In 1487, the king sent Covilham and Paayva on the same mission: the former had served in Africa as a soldier, and was intimately acquainted with Arabic. In order to facilitate this enterprise, Covilham was entrusted with a map, drawn up by two Jews, which most probably was a copy of the map of Mauro, of which we have already spoken. On this map, a passage round the south of Africa was laid down as having been actually accomplished, and Covilham was directed to reach Abyssinia, if possible; and ascertain there or elsewhere, whether such a passage did really exist. Covilham went from Naples to Alexandria, and thence to Cairo. At this city he formed an acquaintance with some merchants of Fez and Barbary, and in their company went to Aden. Here he embarked and visited Goa, Calicut, and other commercial cities of India, where he saw pepper and ginger, and heard of cloves and cinnamon. From India he returned to the east coast of Africa, down which he went as low as Sofala, "the last residence of the Arabs, and the limit of their knowledge in that age, as it had been in the age of the Periplus." He visited the gold mines in the vicinity of this place: and here he also learnt all the Arabs knew respecting the southern part of Africa, viz. that the sea was navigable to the south-west (and this indeed their countrymen believed, when the author of the Periplus visited them); but they knew not where the sea terminated. At Sofala also Covilham gained some information respecting the island of the Moon, or Madagascar. He returned to Cairo, by Zeila, Aden, and Tor. At Cairo, he sent an account of the intelligence to the king, and in the letter which contained it, he added, "that the ships which sailed down the coast of Guinea, might be sure of reaching the termination of the continent, by persisting in a course to the south, and that when they should arrive in the eastern ocean, their best direction must be to enquire for Sofala and the island of the Moon."
"It is this letter," observes Dr. Vincent, "above all other information, which, with equal justice and equal honour, assigns the theoretical discovery to Covilham, as the practical to Diaz and Gama; for Diaz returned without hearing any thing of India, though he had passed the Cape, and Gama did not sail till after the intelligence of Covilham had ratified the discovery of Diaz." One part of the instructions given to Covilham required him to visit Abyssinia: in order to accomplish this object, he returned to Aden, and there took the first opportunity of entering Abyssinia. The sovereign of his country received and treated him with kindness, giving him a wife and land. He entered Abyssinia in 1488, and in 1521, that is, 33 years afterwards, the almoner to the embassy of John de Lima found him. Covilham, notwithstanding he was as much beloved by the inhabitants as by their sovereign, was anxious to return to Portugal, and John de Lima, at his request, solicited the king to grant him permission to that effect, but he did not succeed. "I dwell," observes Dr. Vincent, "with a melancholy pleasure on the history of this man,--whom Alvarez, the almoner, describes still as a brave soldier and a devout Christian;--when I reflect upon what must have been his sentiments on hearing the success of his countrymen, in consequence of the discovery to which he so essentially contributed. They were sovereigns of the ocean from the Cape of Good Hope to the straits of Malacca: he was still a prisoner in a country of barbarians."
It might have been supposed, that after it had been ascertained by Diaz that the southern promontory of Africa could be doubled, and by Covilham, that this was the only difficulty to a passage by sea to India, the court of Portugal would have lost no time in prosecuting their discoveries, and completing the grand object they had had in view for nearly a century: this, however, was not the case. Ten years, and another reign, and great debates in the council of Portugal were requisite before it was resolved that the attempt to prosecute the discovery of Diaz to its completion was expedient, or could be of any advantage to the nation at large. At last, when Emanuel, who was their sovereign, had determined on prosecuting the discovery of India, his choice of a person to conduct the enterprise fell on Gama. As he had armorial bearings, we may justly suppose that he was of a good family; and in all respects he appears to have been well qualified for the grand enterprise to which he was called, and to have resolved, from a sense of religion and loyalty, to have devoted himself to death, if he should not succeed. Diaz was appointed to a command under him, but he had not the satisfaction of witnessing the results of his own discovery; for he returned when the fleet had reached St. Jago, was employed in a secondary command under Cabral, in the expedition in which Brazil was discovered, and in his passage from that country to the Cape, four ships, one of which he commanded, perished with all on board.
As soon as the fleet which Gama was to take with him was ready for sea, the king, attended by all his court, and a great body of the people, formed a solemn procession to the shore, where they were to embark, and Gama assumed the command, under the auspices of the most imposing religious ceremonies. Nearly all who witnessed his embarkation regarded him and those who accompanied him "rather as devoted to destruction, than as sent to the acquisition of renown."
The fleet which was destined to accomplish one of the objects (the discovery of America is the other)--which, as Dr. Robertson remarks, "finally established those commercial ideas and arrangements which constitute the chief distinction between the manners and policy of ancient and modern times,"--consisted only of three small ships, and a victualler, manned with no more than 160 souls: the principal officers were Vasco de Gama, and Paul his brother: Diaz and Diego Diaz, his brother, who acted as purser: and Pedro Alanquer, who had been pilot to Diaz. Diaz was to accompany them only to a certain latitude.
They sailed from Lisbon on the 18th of July, 1497: in the bay of St. Helena, which they reached on the 4th of November, they found natives, who were not understood by any of the negro interpreters they had on board. From the description of the peculiarity in their mode of utterance, which the journal of the voyage calls sighing, and from the circumstance that the same people were found in the bay of St. Blas, 60 leagues beyond the Cape, there can be no doubt that they were Hottentots. In consequence of the ignorance or the obstinacy of the pilot, and of tempestuous weather, the voyage to the Cape was long and dangerous: this promontory, however, was doubled on the 20th of November. After this the wind and weather proving favourable, the voyage was more prosperous and rapid. On the 11th of January, 1498, they reached that part of the coast where the natives were no longer Hottentots, but Caffres, who at that period displayed the same marks of superior civilization by which they are distinguished from the Hottentots at present.