Bearing in mind the preceding considerations, the study of the early maps will become profitable, and I would now direct attention to them to ascertain what light they may throw upon the landfall of John Cabot and the island of St. John opposite to it. It must be remembered that John Cabot took the time to go on shore at his landfall, and planted the banners of England and St. Mark there. At that time of year and in that latitude it was light at half-past three, but it was five when he saw land, and he had to reach it and perform the ceremonies appropriate for such occasions; so the island opposite could not be far away. The island, then, will be useful to identify the landfall if we find it occurring frequently on the succeeding maps. Don Pedro de Ayala, joint Spanish ambassador at London, wrote, on July 25, 1498, to his sovereigns that he had procured and would send a copy of John Cabot's chart of his first voyage. This map of Juan de la Cosa is evidence that Ayala fulfilled his promise. It is a manuscript map made at the end of the year 1500, by the eminent Biscayan pilot, who, if not the equal of Columbus in nautical and cosmographical knowledge, was easily the second to him. Upon it there is a continuous coast line from Labrador to Florida, showing that the claim made by Sebastian Cabot of having coasted from a region of ice and snow to the latitude of Gibraltar was accepted as true by La Cosa, whatever later Spanish writers may have said. Recent writers of authority have arrived at the conclusion that, immediately after Columbus and Cabot had opened the way, many independent adventurers visited the western seas; for there are a number of geographical facts recorded on the earliest charts not easy to account for on any other hypothesis. Dr. Justin Winsor shows that La Cosa, and others of the great sailors of the earliest years of discovery, soon recognized that they had encountered a veritable barrier to Asia, consisting of islands, or an island of continental size, through which they had to find a passage to the golden East. Their views were not, however, generally accepted.