No More Learning

Where Grecian commerce extended its influence
the deserts became cultivated fields, cities rose, and men were drawn
from the woods and caverns to unite in society. The Romans, on the other
hand, when they destroyed Carthage, buried in her ruins the fountain of
civilization, improvement and opulence. They extinguished the spirit of
commerce, and the agriculture of the conquered nations. And thus, while
the luxury of Rome consumed the wealth of her provinces, her
uncommercial policy dried up the sources of its continuance. Nor were
the inestimable advantages of commerce the sole motives of Henry. All
the ardour that the love of his country could awaken conspired to
stimulate the natural turn of his genius for the improvement of
navigation.

As the kingdom of Portugal had been wrested from the Moors, and
established by conquest, so its existence still depended on the
superiority of force of arms; and even before the birth of Henry, the
superiority of the Portuguese navies had been of the utmost consequence
to the protection of the state. Whatever, therefore, might curb the
power of the Moors, was of the utmost importance to the existence of
Portugal. Such were the views and circumstances which united to inspire
the designs of Henry, designs which were powerfully enforced by the
religion of that prince. Desire to extirpate Mohammedanism was
synonymous with patriotism in Portugal. It was the principle which gave
birth to, and supported their monarchy. Their kings avowed it; and
Prince Henry always professed, that to propagate the Gospel and
extirpate Mohammedanism, was the great purpose of all his enterprises.
The same principles, it is certain, inspired King Emmanuel, under whom
the eastern world was discovered by Gama. [42]

The crusades, which had rendered the greatest political service to Spain
and Portugal, had begun now to have some effect upon the commerce of
Europe. The Hanse Towns had received charters of liberty, and had united
together for the protection of their trade against the pirates of the
Baltic.
The Lombards had opened a lucrative traffic with the ports of
Egypt, from whence they imported into Europe the riches of India; and
Bruges, the mart between them and the Hanse Towns, was, in consequence,
surrounded with the best agriculture of these ages,[43] a certain proof
of the dependence of agriculture upon the extent of commerce. The Hanse
Towns were liable, however, to be buried in the victories of a tyrant,
and the trade with Egypt was exceedingly insecure and precarious. Europe
was still enveloped in the dark mists of ignorance; commerce still
crept, in an infant state, along the coasts, nor were the ships adapted
for long voyages. A successful tyrant might have overwhelmed the system
of commerce entirely, for it stood on a much narrower basis than in the
days of Phoenician and Greek colonization. A broader and more permanent
foundation of commerce than the world had yet seen was wanting to bless
mankind, and Henry, Duke of Viseo, was born to give it.

In order to promote his designs, Prince Henry was appointed
Commander-in-chief of the Portuguese forces in Africa. He had already,
in 1412, three years before the reduction of Ceuta,[44] sent a ship to
make discoveries on the Barbary coast. Cape Nam[45] (as its name
implies) was then the _ne plus ultra_ of European navigation; the ship
sent by Henry, however, passed it sixty leagues, and reached Cape
Bojador. About a league and a half from Cape St. Vincent (supposed to be
the Promontorium Sacrum of the Romans), Prince Henry built his town of
Sagrez, the best planned and fortified town in Portugal. Here, where the
view of the ocean inspired his hopes, he erected his arsenals, and built
and harboured his ships. And here, leaving the temporary bustle and
cares of the State to his father and brothers, he retired like a
philosopher from the world in order to promote its happiness. Having
received all the information he could obtain in Africa, he continued
unwearied in his mathematical and geographical studies; the art of
ship-building received amazing improvement under his direction, and the
correctness of his ideas of the structure of the globe is now confirmed.
He it was who first suggested the use of the mariner's compass, and of
longitude and latitude in navigation, and demonstrated how these might
be ascertained by astronomical observations. Naval adventurers were now
invited from all parts to the town of Sagrez, and in 1418 Juan Gonsalez
Zarco and Tristran Vaz set sail on an expedition of discovery, the
circumstances of which give us a striking picture of the state of
navigation ere it was remodelled by the genius of Henry.

Cape Bojador, so named from its extent,[46] runs about forty leagues to
the westward, and for about six leagues off land there is a most violent
current, which, dashing upon the shallows, makes a tempestuous sea.