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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.

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.

This detailed map of the Dutch East Indies in the mid-19th century contains a great deal of information: topographical details, settlements and administrative areas, roads, railways and maritime routes, telegraph lines, inset maps etc.

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.

The colonial possessions of Britain, the Netherlands, Spain, Portugal and Denmark are shown on this mid-19th century map of Southeast Asia. There are inset maps of Penang Island and Singapore, and text describing the region’s colonial history.

The Dutch East Indies are bordered in red on this mid-19th century map. A maritime postal route from China to Europe, via Singapore and Penang, is shown. Another maritime route, from Batavia to Singapore, is also marked.