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The United States Treasury Department produced this map of trade routes crossing the Pacific Ocean between the United States and Asia. Each route is labelled with the names of its ports, and with the distance between them in miles.

Southeast Asia is on sheet four of this map. British colonial territory—British Burma, the Straits Settlements, Sarawak, Brunei, British North Borneo—is highlighted in red, with Dutch, Spanish, French and Portuguese territory also shown.

This map highlights the colonisation of Southeast Asia, showing French Indochina (green), British Burma and Malaya (orange), the Dutch East Indies (pink), and the Spanish Philippines (green). In the region, only Siam (yellow) is independent.

Map of Asia featuring steamship routes—including around Southeast Asia—connecting ports such as Penang, Singapore, Batavia (Jakarta), Saigon, Bangkok, Rangun (Yangon), Manila, Macassar (Makassar) etc. There is also an inset map of Singapore.

Southeast Asia is on sheet four of this map. British colonial territory—British Burma, the Straits Settlements, Sarawak, British North Borneo—is highlighted in red, with the Dutch East Indies, Spanish Philippines and Portuguese East Timor also shown.

On this map of Southeast Asia, numerous small islands, shoals and reefs are marked and named, especially in the South China Sea and around the Sunda and Maluku islands. Submarine cables to carry telegraph messages around the region are also shown.

Produced by the Intelligence Branch of the British War Office, this map shows Dutch colonial territories in maritime Southeast Asia, and their political and military divisions in Java and Madura. British and Spanish territories are also marked.

Three maps of the Caroline Islands. One shows colonised areas in Southeast Asia: Dutch East Indies; British North Borneo, British New Guinea; German New Guinea; Philippines (Spain); Portuguese Timor. The route of the Challenger expedition is marked.

This 1883 map shows European colonial territories in Southeast Asia. An inset map details the proposed French annexation of Tonquin, Annam and Cochin China (modern Vietnam). International telegraph lines are also marked.

A map of Southeast Asia coloured to indicate the five different language families spoken in the region in the late 19th century. Names of indigenous tribes/languages are marked in red text, with European colonial possessions in grey.

A map of Southeast Asia coloured to indicate the five different language families spoken in the region in the late 19th century. Names of indigenous tribes/languages are marked in red text, with European colonial possessions in grey.

This late 19th century map of Southeast Asia shows the best maritime routes around the region, according to the time of year. There are also inset maps highlighting the rivers and southern islands of Singapore, and the sea depth around Labuan Island.