Returning from Ceuta, where his presence was no longer necessary, and where he had matured his judgment by intercourse with, various learned men whom his bounty had attracted into Africa, and having enlarged his views by the perusal of every work which tended to illustrate the discoveries which he projected, Don Henry fixed his residence at the romantic town of Sagres, in the neighbourhood of Cape St Vincent, where he devoted his leisure to the study of mathematics, astronomy, cosmography, and the theory of navigation, and even established a school or academy for instructing his countrymen in these sciences, the parents of commerce, and the sure foundations of national prosperity. To assist him in the prosecution of these his favourite studies, he invited, from Majorca, a person named Diego, or James, who was singularly skilful in the management of the instruments then employed for making astronomical observations at sea, and in the construction of nautical charts. Some traces of nautical discoveries along the western coast of Africa still remained in ancient authors; particularly of the reported voyages of Menelaus, Hanno, Eudoxus, and others. From an attentive consideration of these, Don Henry and his scientific coadjutor were encouraged to hope for the accomplishment of important discoveries in that direction; and they were certainly incited in these views by the rooted enmity which had so long rankled among the Christian inhabitants of Spain and Portugal against the Moors, who had formerly expelled their ancestors from the greatest part of the peninsula, and with whom they had waged an incessant war of several centuries in recovering the country from their grasp. SECTION II. _Discovery of the Madeira Islands._