Now all the geographers of repute supposed that there was not nearly so large a distance as there proved to be, in truth, between Europe and Asia. Thus, in the geography of Ptolemy, which was the standard book at that time, one hundred and thirty-five degrees, a little more than one-third of the earth’s circumference, is given to the space between the extreme eastern part of the Indies and the Canary Islands. In fact, as we now know, the distance is one hundred and eighty degrees, half the world’s circumference. Had Columbus believed there was any such immense distance, he would never have undertaken his voyage. Almost all the detailed knowledge of the Indies which the people of his time had, was given by the explorations of Marco Polo, a Venetian traveler of the thirteenth century, whose book had long been in the possession of European readers. It is a very entertaining book now, and may well be recommended to young people who like stories of adventure. Marco Polo had visited the court of the Great Khan of Tartary at Pekin, the prince who brought the Chinese Empire into very much the condition in which it now is. He had, also, given accounts of Japan or Cipango, which he had himself never visited. Columbus knew, therefore, that, well east of the Indies, was the island of Cipango, and he aimed at that island, because he supposed that that was the nearest point to Europe, as in fact it is. And when finally he arrived at Cuba, as the reader will see, he thought he was in Japan. Columbus’s father-in-law had himself been the Portuguese governor of the island of Porto Santo, where he had founded a colony. He, therefore, was interested in western explorations, and probably from him Columbus collected some of the statements which are known to have influenced him, with regard to floating matters from the West, which are constantly borne upon that island by the great currents of the sea. The historians are fond of bringing together all the intimations which are given in the Greek and Latin classics, and in later authors, with regard to a land beyond Asia. Perhaps the most famous of them is that of Seneca, “In the later years there shall come days in which Ocean shall loose his chains, and a great land shall appear . . . and Thule shall not be the last of the worlds.”