Then there is the negative evidence of maps. Juan de la Cosa drew his famous map of the world in 1500, after serving in the voyage of Hojeda, in company with Vespucci. He placed flags on the discovered parts, and one on each of the farthest known points. There is a Spanish flag at Cabo de la Vela, the extreme point then known in South America, another at the extreme point reached by Columbus on the north coast of Cuba, and an English flag at the extreme point reached by Cabot. A conjectural line runs round from the last English to the first Spanish flag, and there is no sign of the alleged Vespucci discoveries. If it is suggested that the Florentine himself kept them secret, without any conceivable object for doing so, there were all his companions to proclaim them, and there must have been an official report. If those 870 leagues of coast had been discovered, the discovery must have been shown on the map of Juan de la Cosa.
The Cantino map furnishes additional evidence against Vespucci of an interesting kind. This map of the world was compiled for the Duke of Ferrara by order of Alberto Cantino, to illustrate the voyages of Corte Real. It was drawn by a Portuguese draughtsman at Lisbon, and was finished in the autumn of 1502, having been paid for in November of that year. On the Cantino map, the coast-line discovered by Hojeda in 1499 is shown. It is not copied from the map of Juan de la Cosa, for most of the names are different[49]; but the information must have been supplied by some one who was in Hojeda's expedition. Vespucci was in Lisbon in the autumn of 1502; it is, therefore, almost certain that this coast-line was laid down from information supplied by Vespucci.[50] If Vespucci, in 1497, had discovered a coast-line between 16° and 23° N., and another coast-line extending from 23° N. for 870 leagues N. W., these marvellous discoveries would also appear on the Cantino map. But there is not a sign of them. We may conclude from this that Vespucci had not yet conceived the idea of the fictitious voyage of 1497, when he assisted Cantino's draughtsman in the autumn of 1502. The imposture is first hinted at some six months afterwards in the Medici letter of March 1503. Peter Martyr gives corroborative evidence that Vespucci assisted the Portuguese cartographer. He says that he visited Bishop Fonseca, and was shown "many of those mappes which are commonly called the shipman cardes, or cardes of the sea: of the which, one was drawen by the Portugales, wherunto Americus Vesputius is said to have put his hande, beinge a man experte in this facultie, and a Florentine borne."[51]