In 1475 Cape St. Catherine, two degrees south of the Line, was reached and then after six more years of languishing exploration and flourishing trade, King John II. succeeded Affonso V. and took up the work, in the spirit of Prince Henry the Navigator.

Now in six short years, exploration carried out the main part of the design of so many years, the southern Cape of Africa was rounded and the way to India laid open. For the time had come, and the man, John, added a new chapter to discovery by the travellers he sent across the Dark Continent and the sailors he despatched to the Arctic Seas to find a north-east passage to China.

He died just as he was fitting up the expedition that was to enter upon the promised land, and the glory of Da Gama's voyage fell to one who had not laboured, but entered upon the fruits of the toil of other men, the palace-king, Emanuel the Fortunate. But at least the names of Diaz, and Diego Cam, and Covilham, the rounding of the Cape of Storms, the first journey (though an overland one), straight from Lisbon to Malabar, belong to the second founder of Portuguese and European discovery, John the Perfect.

VASCO DA GAMA.
from the portrait in possession of count of lavradio.

Less than four months after his father's death, John, who as heir apparent, had drawn part of his income from the African trade and its fisheries, sent out Diego de Azambuga with ten caravels to superintend three undertakings: first the construction of a fort at St. George da Mina, to secure the trade of the Guinea Coast; second, the rebuilding of Henry's old fort at Arguin; third, the exploration of the yet unknown coast as far as possible. For this, stones, brick, wood, mortar, and tools for building were sent out with the fleet, and carved pillars were taken to be set up in all fresh discovered lands, instead of the wooden crosses that had previously done duty. Each pillar was fourteen hands high, was carved in front with the royal arms and on the sides with the names of the King and the Discoverer, with the date of discovery in Latin and Portuguese.

Azambuga's fleet sailed on the 11th of December, 1480, made a treaty with the chief Bezeghichi, near Cape Verde, and reached La Mina, on the south coast of Guinea, on January 19, 1482, after a year spent in fort building and treaty making with the natives of north-west Africa. Fort and church at La Mina were finished in twenty days, and Azambuga sent back his ships with a great cargo in slaves and gold, but without any news of fresh discovery. John was not disposed to be content with this. In 1484, Diego Cam was ordered to go as far to the south as he could, and not to "wait anywhere for other matters." He passed Cape St. Catherine, just beyond the Line, which since 1475 had been the limit of knowledge, and continuing south, reached the mighty river Congo, called by the natives Zaire, and now known as the second of African rivers, the true counterpart of that western Nile, which every geographer since Ptolemy had reproduced and which, in the Senegal, the Gambia, and the Niger, the Portuguese had again and again sought to find their explanation.

Cam, by agreement with the natives, took back four hostages to act as interpreters and next year returned to and passed the Congo, and sailed two hundred leagues beyond, to the site of the modern Walvisch Bay (1485).