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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 Dutch colonial territory in Southeast Asia, including the administrative areas of Java and Madura. Two maritime routes are marked from Batavia to the Maluku Islands: of the brig ‘Douga’ in 1825, and by Baron Godert van der Capellen in 1824.

Map of Dutch colonial territory in Southeast Asia, including the administrative areas of Java and Madura. Two maritime routes are marked from Batavia to the Maluku Islands: of the brig ‘Douga’ in 1825, and by Baron Godert van der Capellen in 1824.

A French map of the Asian colonial possessions of the Netherlands (Dutch East Indies), with an inset map of the island of Java. Colonies of Britain (Malay Peninsula), Spain (the Philippines) and Portugal (parts of Floris and Timor) are also marked.

A French map of the Asian colonial possessions of the Netherlands (Dutch East Indies), with an inset map of the island of Java. Colonies of Britain (Malay Peninsula), Spain (the Philippines) and Portugal (parts of Floris and Timor) are also marked.

Map showing the kingdoms, states and nations of Asia. They are listed—along with major cities and rivers—in an extensive key. Each location has a two letter code that identifies its location on the map (uppercase is longitude; lowercase is latitude).

Map showing the kingdoms, states and nations of Asia. They are listed—along with major cities and rivers—in an extensive key. Each location has a two letter code that identifies its location on the map (uppercase is longitude; lowercase is latitude).