South America on Maps before Columbus? Martellus's ‘Dragon's Tail’ Peninsula

Abstract

Henricus Martellus's four world maps of c.1489 show a non‐existent Asian peninsula east of the Aurea Chersonesus (the Malay peninsula). For some decades a group of scholars in Latin America has been claiming that this so‐called ‘Dragon's Tail’ peninsula is really a pre‐Columbian map of South America. In this paper, the cartographical and place‐name evidence is examined, showing that the identification has not been proved, and that perceived similarities between the river and coastal outlines on this ‘Dragon's Tail’ peninsula and those of South America are fortuitous. Ptolemy's depiction of an enclosed Indian Ocean was invalidated when Bartolomeu Dias rounded the Cape of Good Hope. Consequently, a year or two later, Martellus adapted the east Asian section of Ptolemy's world map, providing China with an east coast and turning the southward extension of Asia into a peninsula. The non‐Ptolemaic place‐names on these maps were derived from Marco Polo's writings.