In The Library Of St. Marc, At Venice, There Is A Map Drawn By Bianco, In
1436.
In it the ancient world is represented as forming one great
continent, divided into two unequal parts by the Mediterranean, and by the
Indian Ocean, which is carried from east to west, and comprises a great
number of islands.
Africa stretches from west to east parallel to Europe
and Asia, but it terminates to the north of the equator. The peninsula of
India and the Gulf of Bengal scarcely appear. The eastern part of Asia
consists of two great peninsulas, divided by an immense gulf. Then appear
Cathai, Samarcand, and some other places, the names of which are
unintelligible. All the kingdoms of Europe are laid down except Poland and
Hungary. To the west of the Canaries, a large tract of country is laid down
under the appellation of Antitia; some geographers have maintained that by
this America was indicated, but there does not appear any ground for this
belief.
Having offered these preliminary and preparatory observations, we shall now
proceed to the discoveries of the Portuguese. From the slight sketch which
has already been given of the progress of geography and commerce, between
the time of Ptolemy and the fifteenth century, it appears that the
Portuguese had distinguished themselves less, perhaps, than any other
European nation, in these pursuits; but, long before the beginning of the
fifteenth century, circumstances had occurred, connected with their
history, which were preparing the way for their maritime enterprizes. So
early as the year 1250, the Portuguese had succeeded in driving the Moors
out of their country; and, in order to prevent them from again disturbing
them, they in their turn invaded Fez and Morocco, and having conquered
Ceuta in 1415, fortified it, and several harbours near it, on the shores of
the Atlantic. So zealous were the Portuguese in their enterprizes against
the Moors, that the ladies of Lisbon partook in the general enthusiasm, and
refused to bestow their hand on any man who had not signalized his courage
on the coast of Africa, The spirit of the nation was largely participated
by Prince Henry, the fifth son of John I., king of Portugal, who took up
his residence near Cape St. Vincent, in the year 1406. The sole passion and
object of his mind was to further the advancement of his country in
navigation and discovery: his regard for religion led him to endeavour to
destroy or diminish the power of the Mahometans; and his patriotism to
acquire for Portugal that Indian commerce, which had enriched the maritime
states of Italy. He sought every means and opportunity by which he could
increase or render more accurate his information respecting the western
coast, and the interior of Africa: and it is probable that the relations of
certain Jews and Arabs, respecting the gold mines of Guinea, weighed
strongly with him in the enterprizes which he planned, encouraged, and
accomplished.
It is not true, however, that he was the inventor of the astrolobe and the
compass, or the first that put these instruments into the hands of
navigators, though he undoubtedly was an excellent mathematician, and
procured the best charts and instruments of the age: the use and
application of these, he taught in the best manner to those he selected to
command his ships.
With respect to the compass, we have already stated all that is certainly
known respecting its earliest application to the purposes of navigation.
The sea astrolobe, which is an instrument for taking the altitude of the
sun, stars, &c., is described by Chaucer, in 1391, in a treatise on it,
addressed to his little son, Louis; and Purchas informs us, that it was
formerly applied only to astronomical purposes, but was accommodated to the
use of seamen by Martin Behaim, at the command of John II., king of
Portugal, about the year 1487.
About the year 1418, when Prince Henry first began his plan of discovery,
Cape Nun, in latitude 28 deg. 40', was the limit of European knowledge on the
coast of Africa. With this part of the coast, the Portuguese had become
acquainted in consequence of their wars with the Moors of Barbary. In 1418,
two of Henry's commanders reached Cape Boyada in latitute 26 deg. 30'; but the
Cape was not actually doubled till 1434. The Canary islands were visited
during the same voyage that the Cape was discovered: Madeira was likewise
visited or discovered; it was first called St. Laurence, after the saint of
the day on which it was seen, and afterwards Madeira, on account of its
woods. In 1420, the Portuguese set fire to these woods, and afterwards
planted the sugar cane, which they brought from Sicily, and the vines which
they brought from Cyprus. Saw mills were likewise erected on it.
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.
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