Note Back to Main Text — Chapter VI · THE FINDING OF STRANGE COASTS.

However this may have been, the letter clearly proves that at that most interesting period, in or about 1474, Columbus was already meditating upon the westward route.[447] Whether he owed the idea to Toscanelli, or not, is a question of no great The idea was suggested by the globular form of the earth; importance so far as concerns his own originality; for the idea was already in the air. The originality of Columbus did not consist in his conceiving the possibility of reaching the shores of Cathay by sailing west, but in his conceiving it in such distinct and practical shape as to be ready to make the adventure in his own person. As a matter of theory the possibility of such a voyage could not fail to be suggested by the globular form of the earth; and ever since the days of Aristotle that had been generally admitted by men learned in physical science. Aristotle proved, from the different altitudes of the pole-star in different places, that the earth must necessarily be a globe. Moreover, says Aristotle, "some stars are seen in Egypt or at Cyprus, but are not seen in the countries to the north of these; and the stars that in the north are visible while they make a complete circuit, there undergo a setting. So that from this it is manifest, not only that the form of the earth is round, but also that it is part of not a very large sphere; for otherwise the difference would not be so obvious to persons making so small a change of place. Wherefore we may judge that those persons who connect the region in the neighbourhood of the Pillars of Hercules with that towards India, and who assert that in this way the sea is ONE, do not assert things very improbable."[448] It thus appears that more than eighteen centuries before and was as old as Aristotle. Columbus took counsel of Toscanelli, "those persons" to whom Aristotle alludes were discussing, as a matter of theory, this same subject. Eratosthenes held that it would be easy enough to sail from Spain to India on the same parallel were it not for the vast extent of the Atlantic ocean.[449] On the other hand, Seneca maintained that the distance was probably not so very great, and that with favouring winds a ship might make the voyage in a few days.[450] In one of his tragedies Seneca has a striking passage[451] which has been repeatedly quoted as referring to the discovery of America, and is certainly one of the most notable instances of prophecy on record. There will come a time, he says, in the later years, when Ocean shall loosen the bonds by which we have been confined, when an immense land shall lie revealed, and Opinions of ancient writers. Tethys shall disclose new worlds, and Thule will no longer be the most remote of countries. In Strabo there is a passage, less commonly noticed, which hits the truth—as we know it to-day—even more closely. Having argued that the total length of the Inhabited World is only about a third part of the circumference of the earth in the temperate zone, he suggests it as possible, or even probable, that within this space there may be another Inhabited World, or even more than one; but such places would be inhabited by different races of men, with whom the geographer, whose task it is to describe the known world, has no concern.[452] Nothing could better illustrate the philosophical character of Strabo's mind. In such speculations, so far as his means of verification went, he was situated somewhat as we are to-day with regard to the probable inhabitants of Venus or Mars.