The author of this 1699 nautical chart, John Thornton, served with two English trading companies. The Island of Sumatra, the Straits of Malacca and the Sunda which are shown here were strategic passages to Southeast Asia and the Spice Islands. The style of this portolan, its harmony of colours and careful handwriting are the essential characteristics of the works of this English cartographer.
A map kept at the French national library BnF (Bibliothèque nationale de France), Maps and Plans Department, shelf mark number GE SH 18 PF 194 DIV 2 P 4 RES
View this document in the digital Gallica library:
https://gallica.bnf.fr/ark:/12148/btv1b5905708x