He, therefore, equipped some small vessels, and commanded that they should pass, as far as they could, along that coast of Africa which looked upon the great Atlantick ocean, the immensity of which struck the gross and unskilful navigators of those times with terrour and amazement. He was not able to communicate his own ardour to his seamen, who proceeded very slowly in the new attempt; each was afraid to venture much farther than he that went before him, and ten years were spent before they had advanced beyond cape Bajador, so called from its progression into the ocean, and the circuit by which it must be doubled. The opposition of this promontory to the course of the sea, produced a violent current and high waves, into which they durst not venture, and which they had not yet knowledge enough to avoid, by standing off from the land into the open sea.
The prince was desirous to know something of the countries that lay beyond this formidable cape, and sent two commanders, named John Gonzales Zarco, and Tristan Vas, in 1418, to pass beyond Bajador, and survey the coast behind it. They were caught by a tempest, which drove them out into the unknown ocean, where they expected to perish by the violence of the wind, or, perhaps, to wander for ever in the boundless deep. At last, in the midst of their despair, they found a small island, where they sheltered themselves, and which the sense of their deliverance disposed them to call Puerto Santo, or the Holy Haven.
When they returned with an account of this new island, Henry performed a publick act of thanksgiving, and sent them again with seeds and cattle; and we are told by the Spanish historian, that they set two rabbits on shore, which increased so much in a few years, that they drove away the inhabitants, by destroying their corn and plants, and were suffered to enjoy the island without opposition.
In the second or third voyage to Puerto Santo, (for authors do not agree which,) a third captain, called Perello, was joined to the two former. As they looked round the island upon the ocean, they saw at a distance something which they took for a cloud, till they perceived that it did not change its place. They directed their course towards it, and, in 1419, discovered another island covered with trees, which they, therefore, called Madera, or the Isle of Wood.