According to the Bristol chronicle already quoted (Toby, 1565), and according to a legend on the map of 1544, which is ascribed to the collaboration of Sebastian Cabot, it was on St. John’s Day (July 3, N.S.) that the first land was discovered. In spite of Harrisse’s objections[300] it does not appear to me unlikely that this may be correct. If he sailed on May 2 (11), he was fifty-three days at sea. Supposing that he landed at Cape Breton, the distance in a straight line on the course indicated is about 2200 nautical miles. Consequently he would have made an average of forty-two miles a day in the desired direction. This is doubtless not very fast sailing, but agrees with just what we should expect, since he often had to beat, and “wandered a good deal,” in the words of Soncino.
La Cosa’s map represents Cabot’s discoveries in 1497
For determining the question, what part of North America it was that Cabot discovered, it appears to me there is no trustworthy document but La Cosa’s map of the world of 1500.[301] The Basque cartographer, Juan de la Cosa, who owned and navigated Columbus’s ship in 1492, and who was afterwards entrusted with many public undertakings, enjoyed a reputation in Spain as a map-maker and sailor. He was commissioned by the Spanish Crown to produce a map of the world, and we must suppose that for this work he was provided with all the maps and geographical information that were available in Spain. From a letter of July 25, 1498, to Ferdinand and Isabella of Spain, from Ayala, the Spanish Minister in London, we know that the latter had obtained a copy of “the chart or mapa mundi” that John Cabot had made in order to set forth his discoveries of 1497; and there can be no doubt that a copy of this was also sent to Spain, as Ayala says he believes their Majesties already had the map. It may, therefore, be regarded as a matter of course that La Cosa was in possession of this map when, less than two years later, he was about to make his own, and that it is from this source and no other that he derived his information about the English discoveries. We do not know of any other map being sent from England to Spain during these two years, and there is no ground whatever for assuming that La Cosa’s information may be derived from Cabot’s voyage of 1498, which in any case must have been a failure.
North-western portion of Juan de la Cosa’s map of 1500. Only a few of the names are given; the network of compass-lines is omitted
For the understanding of La Cosa’s map it must be remarked first of all that it is a compass-chart, and that it takes no notice of the magnetic variation on the American coast. This explains the fact that, for instance, lines of coast which in reality run from west to south-west, are made to appear on the chart as running from west to east. Furthermore, the latitude of the coast of North America is made too northerly, through coasts which, for instance, lie magnetic west of Ireland, being placed on the chart true west of it. In this way Cape Breton (or Cape Race in Newfoundland ?) can be brought to about the same latitude as the south of Ireland, whereas in reality it lies nearly 5° farther south.
The coast marked with five English flags is, of course, the land discovered by Cabot. That La Cosa had a map of this district is further shown by the details, which distinguish it from his delineation of the remainder of the North American coast, but which give it a resemblance to that part of South America which is marked with Spanish flags and of which he had a map. Curiously enough only part of the English district has names; we must suppose that this is the coast that Cabot is said to have sailed along. La Cosa’s representation of the rest of the North American coast is doubtless guesswork, although it has features which bear a remarkable resemblance to reality; but it is not altogether impossible that he may have had oral or written reports of later voyages (?), which are unknown to us.
La Cosa’s map is in complete agreement with the statements in the letters of Pasqualigo, Soncino, and the two Spanish Ambassadors. Soncino says that the country lies four hundred Italian leagues to the west of England, while both Puebla and Ayala say that they believe the distance to be no more than four hundred Spanish leagues. On the other hand, according to Pasqualigo, Cabot said that at a distance of seven hundred Italian leagues he had discovered the mainland of the kingdom of the Great Khan, and that he had sailed [i.e., after having sailed ?] three hundred leagues along the coast. It has been thought that there is here a disagreement between the four hundred leagues of the three first-named and the seven hundred of Pasqualigo, but if we interpret it, in what must be the most reasonable way, as meaning that the distance of seven hundred leagues does not refer to the nearest land, but to the most distant, where Cabot thought that he had at last come within the boundaries of the kingdom of the Great Khan (China) and did not venture to go farther, then we have complete agreement, since the three hundred leagues he must first have sailed along the coast must be deducted in order to get the distance from England to the nearest land. The length of a Venetian “lega,” or a Spanish “legua,” cannot be precisely determined. If we assume [cf. Kretschmer, 1909, pp. 63, ff.] that between 20 and 17½ went to a degree of latitude, each league would correspond to between 3 and 3.43 geographical miles (minutes), or between 5.6 and 6.3 kilometres. According to the former estimate (three miles), four hundred leagues will be about equal to 1200 miles, and seven hundred leagues to about 2100 miles.[302] The first distance is, at any rate, a good deal too small, while the second is too great. This may easily be explained by Cabot, or his crew, having naturally wished to make the voyage to the newly discovered country appear as little deterrent as possible, and, therefore, having underestimated the distance, while, desiring to make the country itself as large as possible, they greatly over-estimated the length of their sail along the coast. That the voyagers really supposed the distance to the newly discovered land to be four hundred leagues from Ireland agrees also with Soncino’s statement that the Bristol sailors thought the voyage would not occupy more than fifteen days from Ireland.
La Cosa’s map is drawn as an equidistant compass-chart, and we can therefore make ourselves a scale of miles by using the distance between the Equator and the Tropic. In this way we find that the easternmost headland, “Cauo de Ynglaterra” (Cape England), on the coast discovered by Cabot lies four hundred leagues from Ireland, while the distance from it to the most western headland with a name, “Cauo descubierto” (the discovered cape), is about three hundred leagues.[303] Furthermore this coast lies on the map due west of Bristol and southern England, as it should according to Soncino’s first letter.