M. Desimoni, while generally acknowledging his indebtedness to Dr. De Costa’s work, and praising that gentleman’s scholarship and research, could not accept all his inferences in the matter of the names, and doubted some of his readings. He therefore caused a fresh examination of the map to be made, through the kind and learned services of Dr. Giacomo Lumbroso and Canon Fabiani. He prints, in the Appendix to his _Studio secondo_ on Verrazano, in parallel columns, the variations from De Costa’s readings. The great difficulty and doubt attending the deciphering words, particularly names, in old documents and maps, is well known to all who have attempted such work.[95] A discovery made lately at Milan brings out a new map, and one of great value in the discussion of Verrazano’s voyage. M. Desimoni, on his return to Genoa from the Geographical Congress held at Venice in September, 1881, stopped at Milan, where he visited the Ambrosian Library to consult some maps. He was there told by the _prefetto_, the Abbé Ceriani, that a map by Vesconte Maggiolo, hitherto supposed to bear the date of 1587, and therefore to have been the work of one of the second generation of this family of map-makers, was really dated 1527. By comparing the legend on this map with one of similar form and writing on a map of 1524, it could be seen that the numeral 2 in the first map had become an 8 by lengthening the curves of the figure until they were finally joined. This appeared to have been done with ink of a paler color. M. Desimoni reproduces the two legends, to show the process.[96] He finds also certain peculiarities in the map, supposed of 1587, which prove that it must belong to the first decades of the century, and therefore entertains no doubt of the correctness of the change in the date. Fresh from studies of early American voyages, M. Desimoni examined the North American portion of this map, particularly the coast, with as great care as his limited time and the poor condition of the parchment permitted. He was not a little surprised to find that the coast bore names closely related both to the Verrazano and to other maps whose source is yet undiscovered. He made a copy of the names, and afterward submitted his work to Signor Carlo Prayer, of Milan, who verified it, and also furnished as perfect a copy as it was possible to make of the names, and a sketch of the whole coast. This was reproduced by M. Desimoni to illustrate a paper prepared for the Società Ligure di’ Storia Patria. This map measures about seventy-five centimetres in length by about fifty in width,—about 29½ inches by 19½. Its legend reads: “Vesconte de Maiollo conposuy hanc cartam in Janua anno d̄ny. 1527, die xx Decenbris.” The place occupied in the Verrazano map by the title NOVA GALLIA, etc., and the legend about Verrazano’s discovery, bears in this map the name FRANCESCA, to indicate exactly a name for the whole region.