481, they had passed the equator, and reached Cape St.
Catherine; in latitude S. 2 deg. 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 deg. 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 sk