Let us state right here that most intelligent people of that day were firmly convinced that the earth was not as flat as a pancake but was round. The Ptolemean system of the universe, invented and duly described by Claudius Ptolemy, the great Egyptian geographer, who had lived in the second century of our era, which had served the simple needs of the men of the Middle Ages, had long been discarded by the scientists of the Renaissance. They had accepted the doctrine of the Polish mathematician, Nicolaus Copernicus, whose studies had convinced him that the earth was one of a number of round planets which turned around the sun, a discovery which he did not venture to publish for thirty-six years (it was printed in 1543, the year of his death) from fear of the Holy Inquisition, a Papal court which had been established in the thirteenth century when the heresies of the Albigenses and the Waldenses in France and in Italy (very mild heresies of devoutly pious people who did not believe in private property and preferred to live in Christ-like poverty) had for a moment threatened the absolute power of the bishops of Rome. But the belief in the roundness of the earth was common among the nautical experts and, as I said, they were now debating the respective advantages of the eastern and the western routes. Among the advocates of the western route was a Genoese mariner by the name of Cristoforo Colombo. He was the son of a wool merchant. He seems to have been a student at the University of Pavia where he specialised in mathematics and geometry. Then he took up his father’s trade but soon we find him in Chios in the eastern Mediterranean travelling on business. Thereafter we hear of voyages to England but whether he went north in search of wool or as the captain of a ship we do not know. In February of the year 1477, Colombo (if we are to believe his own words) visited Iceland, but very likely he only got as far as the Faröe Islands which are cold enough in February to be mistaken for Iceland by any one. Here Colombo met the descendants of those brave Norsemen who in the tenth century had settled in Greenland and who had visited America in the eleventh century, when Leif’s vessel had been blown to the coast of Vineland, or Labrador. [Illustration: THE GREAT DISCOVERIES, WESTERN HEMISPHERE]