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A series of four maps of the Indian Ocean—one for each quarter of the calendar year—showing the direction and intensity of the winds, including around the seas of Southeast Asia. There are extensive explanatory notes.

Map of the Indian Ocean showing the currents (represented by arrows), including during the North East and North West monsoons. Numbers on the arrows indicate the current’s speed.

Map of the Indian Ocean showing maritime routes, including some to and around Southeast Asia, where they pass through the Strait of Malacca, the Sunda Strait, and the straits between the Lesser Sunda Islands.

This map of Asia features the ancient kingdoms of mainland Southeast Asia, such as the Birman Empire, Siam, Tonquin and Cochinchina. There are labels noting the inhabitants of some areas, such as 'Biajos' and ‘Tedongs’ in Borneo, and ‘Kemoy’ in Anam.

This map of Asia features the ancient kingdoms of mainland Southeast Asia, such as the Birman Empire, Siam, Tonquin and Cochinchina. There are labels noting the inhabitants of some areas, such as 'Biajos' and ‘Tedongs’ in Borneo, and ‘Kemoy’ in Anam.

Map of the Bay of Bengal, with the western coast of mainland Southeast Asia. Shoals, reefs and islands are marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation.

Map of the Bay of Bengal, with the western coast of mainland Southeast Asia. Shoals, reefs and islands are marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation.

This map shows the empires and kingdoms of Asia. Its decorative cartouche features a drawing of a censer (incense burner) standing on a plinth, surrounded by patterned curtains and carpet. Magellan’s discovery of the Philippines is noted on the map.

This map shows the empires and kingdoms of Asia. Its decorative cartouche features a drawing of a censer (incense burner) standing on a plinth, surrounded by patterned curtains and carpet. Magellan’s discovery of the Philippines is noted on the map.

This 18th century map of Southeast Asia by the French cartographer Gilles Robert de Vaugondy features the national borders of the Philippines in green, and of modern Indonesia in yellow. The Malay Peninsula and modern Cambodia and Vietnam are in red.

The coast of New Guinea (‘Nouvelle Guinée’) is represented in part by a dotted line on this mid-18th century map, indicating that the exact coastlines were unknown at this time. The western tip is labelled ‘C. de Bonne Esperance [Cape of Good Hope]’.