In the interval between these two voyages of Gonzales, Denis Fernandez, a gentleman of Lisbon, who had belonged to the household of the late king, fitted out a vessel for discovery under the patronage of Don Henry, with a determination to endeavour to penetrate farther to the southwards than any preceding navigator. He accordingly passed to the southwards of the Senegal river, which divides the Azanhaji moors from the Jaloffs, or most northern negroes, and fell in with some almadias or canoes, one of which he captured, with four natives. Proceeding still farther on, without stopping to satisfy his curiosity in visiting the coast, he at length reached the most westerly promontory of Africa, to which he gave the name of Cabo Verde, or the Green Cape, from the number of palm trees with which it was covered. Alarmed by the breakers with which the shore was everywhere guarded, Denis did not venture to proceed any farther, especially as the season was already far advanced, but returned with his captives to Portugal, where he met with a flattering reception from Don Henry, both on account of his discovery of the Cape de Verd, and for the natives he had procured from the newly discovered coast, without having been traded for with the Moors.

Soon after the return of Denis from the Cape de Verd, Gonzales Pachecos, a wealthy officer belonging to the household of Don Henry, fitted out a ship at his own expence, of which he gave the command to Dinisianez da Gram, one of the princes equerries, who was accompanied by Alvaro Gil, an essayer of the mint, and Mafaldo de Setubal. After touching at Cape Branco, they steered along the coast for the isle of Arguin, making descents in several places, where they made a considerable number of captives from the Moors. At the isle De las Garзas they found another caravel, commanded by Lourenзo Dias, which formed part of a considerable squadron that had been lately fitted out from Lagos. Two days afterwards, the admiral of that squadron, Lanзarot, and nine other caravels arrived. Gram informed Lanзarot of his success in making fifty prisoners, whom he had dearly purchased by the loss of seven of his men, who had been murdered by the Moors. Lanзarot immediately sailed for Arguin, bent on revenge, and sacrificed the lives of eight, and the liberty of four of the natives, to the memory of Gonzales da Cintra and the mariners of Gram. On this occasion two of the Portuguese officers were knighted on the newly discovered coast, which seems then to have been a fashionable ambition among them, no doubt arising from the prevailing zeal for maritime discovery. From Arguin Lanзarot passed over to the isle of Tider, whence the inhabitants made their escape to the adjacent continent; but the Portuguese soon followed, and the astonished Moors fled on all sides, after a sharp skirmish, in which a good many of them were slain, and sixty taken prisoners.

The fleet now separated, a part returning home by way of the Canaries, while Lanзarot, with several other caravels, advanced along the coast of Africa southwards, till he got beyond what the Moors called the Зahara, or Sahara, of the Assenaji. This Moorish nation is mentioned by Abulfeda as the ruling tribe in Audagost, or Agadez, and as inhabiting the southern part of Morocco. They are therefore to be considered as the peculiar people of the great desert and its environs, at its western extremity on the Atlantic. The latter part of their name, aji, or rather aspirated haji, signifies a pilgrim, and is now the appropriate title of one who has made the great pilgrimage of Mecca. In the present case, the name of Assenaji probably signifies the Wanderers of the Desert. The Sanhaga, or Assenaji tribe, is now placed at no great distance from the African coast, between the rivers Nun and Senegal; and this latter river has probably received its Portuguese name of Sanaga from that tribe. Ptolemy likewise probably named Cape Verd Arsinarium, from the same people, from which it may be inferred that they anciently occupied both sides of the Senegal river, which is named Dardalus by that ancient geographer.

Twenty leagues beyond the southern boundary of the great desert, Lanзarot came to the mouth of a large river, which had been formerly seen by Denis Fernandez, and named by him Rio Portugues, or the Portuguese river; which was called Ouedech by the natives, and afterwards got the name of Canaga, Zanaga, Sanhaga, Sanaga, or Senega, now the Senegal. Lanзarot passed in safety over the bar of this river, and endeavoured to explore its course upwards, but the weather became unfavourable, and forced him again to sea, when he proceeded with part of his squadron to Cape Verd, near which place he took in a supply of water and goats flesh. The fleet was again dispersed by a second storm, and only three vessels remained under the command of Lanзarot. With these he made a descent on the island of Tider, where he captured fifty-nine Moors; and with these, and some natives he had made prisoners on the banks of the Senegal, he returned into Portugal.

In the year 1447, Nuna Tristan made another voyage to the coast of Africa; and, advancing beyond Cabo dos Mastos, or the Cape of Masts, so named from some dead palms resembling masts, seen there by Lanзarot, who made this discovery in the former voyage, Nuna Tristan proceeded southwards along the coast of Africa, 180 miles beyond Cape Verd, where he reached the mouth of a river which he called Rio Grande, or the Large River, since called Gamber, Gambra, or Gambia. Tristan came to anchor at the mouth of this river, and went in his boat with twenty-two armed men on purpose to explore its course. Having reached to a considerable distance from his ship, he was environed by thirteen almadias or canoes, manned by eighty negroes, who advanced with dreadful yells, and poured in continual vollies of poisoned arrows, by which he, and almost every man in his boat were wounded before they could regain the ship. Nuno Tristan and all the wounded men died speedily of the effects of these poisoned weapons, himself only living long enough to recount the nature of the terrible disaster to the small remainder of the crew who had been left in charge of the caravel; which was brought home by only four survivors, after wandering for two months in the Atlantic, scarcely knowing which way to steer their course.

There appears some difficulty and contradiction in regard to the river discovered by Nuna Tristan, from the vague name of Rio Grande. Instead of the Gambia, in lat. 13° 30' N. some of the Portuguese historians are inclined to believe that this fatal event took place at another river, in lat. 10° 15' N. at least 500 nautical miles beyond the Gambia, to the S.S. E. which was afterwards called Rio de Nuno. This is scarcely probable, as no notice whatever is taken of the great archipelago of shoals and islands which extend from Cabo Rosso to beyond the mouth of that river which is still called Rio Grande. Yet it must be acknowledged that our remaining information respecting these early Portuguese voyages of discovery, is unfortunately vague and unsatisfactory.

In the same year, 1447, Alvaro Fernando proceeded to the coast of Africa, and is said to have advanced forty leagues beyond Tristan, having arrived at the mouth of a river called Tabite266, 100 miles to the south of Rio Nuno. Notwithstanding the appearance of a determined opposition on the part of the natives, who had manned five almadias, Alvaro resolved to explore its course in his boat, and proceeded up the river for that purpose, with the utmost circumspection. One of the almadias stood out from the rest, and attacked his boat with great bravery, discharging a number of poisoned arrows, by which Alvaro and several of his men were wounded, which forced him to desist and return to his ship. Being, however, provided with theriac and other antidotes against the poison, Alvaro and all his men recovered from their wounds. He resolved, after leaving the river Tabite, to proceed along the coast, which he did to a sandy point; and, apprehending no danger in so open a situation, was preparing to land, when he was suddenly assailed by a flight of poisoned arrows, from 120 negroes who started up from a concealment. Alvaro, therefore, desisted from any farther attempt to explore the coast, and returned to Lagos to give an account of his proceedings.