[2][n 3] Recently, however, the University of Valladolid-affiliated scholar, Jesús Varela Marcos, has proposed that the map was created jointly by Martyr and Juan Rodríguez de Fonseca in 1514, and thereafter included a posteriori in copies of the former's 1511 edition of Decades.

Martyr, in virtue of his 'privileged position' within the court of the Catholic Monarchs, is thought to have been privy to current discoveries of the day, and to classified intelligence therefrom, via, for instance, personal debriefings from leading explorers.

[11] [W]e examined numerous reports of those expeditions, and we have likewise studied the terrestrial globe on which the discoveries are indicated, and also many parchments, called by the explorers navigators’ charts.

'[12] In a 2005 paper for The Florida Geographer, the unaffiliated scholar Douglas T Peck proposed a correction of the northwestern portion of the map which shifted the western continental coastline down by some six degrees.

[13][n 11] Copies of the Peter Martyr map 'have long been separated from their parent document and have been reproduced extensively in studies and popular literature on early cartography.