On the twenty-fifth June he discovered the island de Sal, one of the Cape Verdes, and passing it he came to another very improperly named Bona vista, which signifies good prospect, yet the place is dull and wretched.  Here he cast anchor in a channel near a small island in which there are six or seven houses appointed for persons who are afflicted with the leprosy, who come there to be cured.  And as sailors rejoice when they discover land, so do these wretches much more when they discover any ship; wherefore they immediately ran down to the shore to speak with the people whom the admiral sent on shore to take in water and salt.  There are likewise abundance of goats in that island.  Understanding that our people were Spaniards, the Portuguese who had charge of this island for the owner went on board to wait upon the admiral, and made offer of every assistance in his power, for which the admiral thanked him and ordered him to be well treated, and to have some provisions given him, for by reason of the barrenness of the island the inhabitants live very miserably.  Being desirous to know what methods were used for curing the leprosy, this man told the admiral that the excellent temperature of the air was one principal cause, and the next the diet of the infected; for there came to this island vast numbers of turtles, on which the sick chiefly feed, and anoint themselves with the blood of these animals, and are by these means speedily cured; but that such as are born with the distemper are longer of being cured.  The reason assigned for the great numbers of turtle was, that the shores of the island being all sandy, these creatures resort thither from the west coast of Africa in the months of June, July, and August, to deposit their eggs.  They are mostly as large as an ordinary target, and come every night on shore to sleep and to lay their eggs in the sand.  The people go along the shore at night with lanterns and other lights, seeking the tracks which the turtle leaves in the sand, which they follow till they find the animal, which being tired with the exertion, sleeps so soundly as not to waken on their approach.  Having found a turtle it is turned on its back, and without doing any more harm they go on to seek more, which are treated in the same manner.  Having got as many as they think fit, they come back in the morning to choose those they like best, as they cannot possibly recover their feet when once turned over.  They then carry off such as they think fit, turning up the smaller ones upon their belly and allowing them to go away.  The island being very dry and barren, without either trees or springs, the wretched sick inhabitants have no other sustenance, and are entirely without employment, and they are necessitated to drink of the thick and brackish water of certain wells, there being none else to be found.