Note Back to Main Text — Chapter V · THE SEARCH FOR THE INDIES. WESTWARD OR SPANISH ROUTE.

Early in the Christian era we are told by an eminent Greek astronomer that the doctrine of the earth's sphericity was accepted by all competent persons except the Epicureans.[453] Among the Fathers of the Church there was some difference of opinion; while in general they Opinions of Christian writers. denied the existence of human beings beyond the limits of their Œcumene, or Inhabited World, this denial did not necessarily involve disbelief in the globular figure of the earth.[454] The views of the great mass of people, and of the more ignorant of the clergy, down to the time of Columbus, were probably well represented in the book of Cosmas Indicopleustes already cited.[455] Nevertheless among the more enlightened clergy the views of the ancient astronomers were never quite forgotten, and in the great revival of intellectual life in the thirteenth century the doctrine of the earth's sphericity was again brought prominently into the foreground. We find Dante basing upon it the cosmical theory elaborated in his immortal poem.[456] In 1267 Roger Bacon. Roger Bacon—stimulated, no doubt, by the reports of the ocean east of Cathay—collected passages from ancient writers to prove that the distance from Spain to the eastern shores of Asia could not be very great. Bacon's argument and citations were copied in an extremely curious book, the "Imago Mundi," published in 1410 by the Cardinal Pierre d'Ailly, Bishop of Cambrai, better known by the Latinized form of his name as The "Imago Mundi" of Petrus Alliacus. Petrus Alliacus. This treatise, which throughout the fifteenth century enjoyed a great reputation, was a favourite book with Columbus, and his copy of it, covered with marginal annotations in his own handwriting, is still preserved among the priceless treasures of the Biblioteca Colombina.[457] He found in it strong confirmation of his views, and it is not impossible that the reading of it may have first put such ideas into his head. Such a point, however, can hardly be determined. As I have already observed, these ideas were in the air. What Columbus did was not to originate them, but to incarnate them in facts and breathe into them the breath of life. It was one thing to suggest, as a theoretical possibility, that Cathay might be reached by sailing westward; and it was quite another thing to prove that the enterprise was feasible with the ships and instruments then at command.