It was thus that the negro slave trade began, and for two hundred and fifty years slave ships plied to and fro across the Atlantic Ocean, bringing over countless colored people, who were sold first to the Spaniards and later to the Americans. The English were so anxious to discover a northwest passage to India (that is, a way to sail through or around the northern part of America) that they sent Frob´ish-er out to search for it in 1576. He sailed northward until he came to the bay which still bears his name. He landed there, and, to his delight, found some yellow ore, which he carried home. This was what is now known as fool's gold, or pyrites; but the English, thinking it was real gold, quickly sent out a ship to bring home a whole cargo of the worthless stuff. Some time after this visit of Frobisher's, Da´vis sailed still farther north, only to be driven back by the ice in the strait which still bears his name. Although he did not know it, Davis had discovered the entrance to the long-sought northwest passage; but it could never be used to reach Asia, as people hoped, on account of the great icebergs which block it up nearly all the year. Another great English seaman of this time was Francis Drake, who first sailed with the slave trader Hawkins. When he came to the Spanish settlements in the West Indies and Mexico, and saw how much gold was shipped to Spain, he wanted to get some of it for his country, too. He therefore set out with several vessels, and although war had not yet been declared between England and Spain, he boldly attacked the Spanish colonies and ships, and secured much booty. When war broke out Drake became more daring than ever, and running unexpectedly into the Spanish ports, he began plundering. Then, setting fire to the shipping, he sailed off again, after thus "singeing the King of Spain's beard," as he called it. During one of his many journeys, Drake landed on the Isthmus of Panama, where, climbing the mountains, he was the first Englishman to behold the Pacific Ocean, about fifty years after it had been seen by Balboa. In the course of his piratical expeditions Drake sailed through the Strait of Magellan into the Pacific Ocean, and, after securing much booty from the Spaniards in Peru, coasted about until he came to the Californian bay which still bears his name. He called this part of the country New Al´bi-on, and made such friends with the Indians there that they invited him to stay and be their king. But Drake was anxious to carry his treasures home; and as he knew a Spanish fleet was lying in wait for him near the Strait of Magellan, he boldly crossed the Pacific, and went back by way of the Cape of Good Hope. He was thus, as he said, the first Englishman who "plowed a furrow around the globe." Queen E-liz´a-beth was so proud of this fact that she knighted Drake on board of his own ship, the _Pelican_, and graciously accepted all the stolen jewels he gave her (1580). [Illustration: The Pelican Chair.]