So America was forgotten until, according to an old story, a Welsh prince named Mad´oc was driven across the Atlantic by a storm, in the twelfth century. He was so well pleased with the new country he found that he is said to have left some of his men there, promising to return soon with more settlers. The story goes on to say that he sailed from Wales to keep this promise, but no one ever heard anything more of him, or of the men he left in America. Some people think that he and his men perished in a storm, and that the settlers he left behind him were murdered by the Indians. Others insist that the whole story was made up by the Welsh, so they could claim the honor of having discovered America. Whether the Welsh ever came here or not,--and it is hardly likely they ever did,--the fact remains that our continent, after being discovered by Europeans, was lost again. VI. QUEER IDEAS. People living in Europe, near the sea, were all fond of cruising about; but as they had no compass at first, they seldom ventured out of sight of land, for fear of losing their way. After a time they learned to steer their vessels by means of the stars; but as these could serve as guides only on clear nights, sailors were glad to use the compass when it became known in Europe, in the twelfth century. But although seamen now fearlessly cruised about the European waters, they did not venture far out into the Atlantic, which was then known as the "Sea of Darkness." The fact is, they were afraid to do so, because they had been told they would meet strange monsters there, such as mermen and mermaids. They also thought their vessels would be drawn toward the "Loadstone Mountain," a great magnetic rock which would draw all the nails out of their planks, and thus make their boats fall to pieces. [Illustration: Primitive Map] Of course this was all nonsense, but most of the seamen believed these tales as firmly as some sailors now believe that Friday is an unlucky day; and as no one had ever gone far out in the Atlantic, even learned men could not prove to them that they were mistaken. Besides, although they had fairly good maps of the countries they had visited, people knew nothing at all of the rest of the world. Their maps showed only the northern part of Africa, the western and southern parts of Europe, and the western part of Asia. All the rest was a blank. Common people then believed that the earth was round and flat, like a pie, with the ocean flowing all around it. So they were afraid to venture too far out, lest they should fall over the edge of the world and drop down into space! Wise men, however, already knew better; for, about three hundred years before Christ, Greek philosophers had begun to suspect that the earth is round like a ball, and not flat, as every one until then had supposed.