History of Ethiopia
German historian Hiob Ludolf was an academic authority on the Ethiopia of his day, having befriended an Ethiopian Christian in Rome who became the main source for his understanding of the country. Published in 1681, Ludolf's History of Ethiopia (1681) argued that Prester John was not the Ethiopian negus; instead, Ludolf reasoned, Prester John must have been the Asian monarch he was considered centuries before. Here, following Balthazar Téllez's theory, Ludolf argues that Covilhā was responsible for the misattribution of Prester John to Ethiopia:
[Covilhā, traveling] in some of the Ports of the Red Sea, heard much talk of a most Potent Christian King of the Abessines, that us'd to carry a Cross in his Hands; as also of his Subjects, who were great Favourers if not Followers of the Christian Religion. Believing it therefore to be of little moment whether this famous Monarch liv'd in Asia or in Africa, he certainly persuades himself, as being Ignorant both in History and Geography that this was the Prince so much sought after.... These glad Tidings the Portugals sooner believ'd, than consider'd, and so spread the News all over Europe for real Truth; Credulaity gaining easily upon those that are ignorant of Foreign Affairs and Kingdoms.
(qtd. in Silverberg, p. 317)
This argument became popular in the seventeenth and eighteenth centuries, even as the link between Prester John and the Ethiopian monarch predates Covilhā's expedition.
