The high opinion held of Vespucci during his life by Columbus and his zealous friends is of little weight, because the admiral's claim to have discovered the supposed Asiatic continent or islands adjacent thereto was undoubted; but the favorable opinions expressed by later writers, especially by Fernando Colon, writing after America was known to be distinct from Asia, tend to prove that the Florentine made in his lifetime no claim to a voyage in 1497. Yet the publication and circulation of his letter in several languages, uncontradicted for years, would indicate its authenticity, unless it be taken as a sign of carelessness for dates and details so long as they were not supposed to conflict with the admiral's claims. It must also be remembered that the same voyager's second, third, and fourth expeditions have all been disputed and have at last proved authentic. M. Varnhagen applies to Vespucci and his men the well-known tradition related by Sahagun and others of white men who appeared at Pánuco from the east before the coming of the Spaniards. He also supposes Guerrero, the soldier found by Cortés at Cozumel, and believed by other authors to have been a survivor with Aguilar of Valdivia's shipwreck in 1512, to have been left in Yucatan by Vespucci; but he gives no reason for this belief, except that Guerrero had married among the natives, and had adopted many of their customs. By the same writer it is thought much more likely that Cape Gracias á Dios was named by Vespucci after a long voyage in search of land, than by Columbus after following the coast a few days and taking possession; especially as Columbus in his own letter simply mentions his arrival at the cape, the fact of his having given the name coming from other sources.