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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.

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.

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.

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

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.

Chart of the Pacific Ocean, showing climate and weather-related data, including around the seas and straits of eastern Southeast Asia where maritime trade routes are marked, along with monsoon regions, ocean temperatures and currents.

Southeast Asia is shown on sheets two and three of this 12-sheet map of the Indian and Pacific oceans, including detailed inset maps of the straits of Singapore, Bangka, Gaspar and Sunda, with bathymetry (sea depth), shoals, reefs, anchorages etc.

This late 19th century map of Southeast Asia shows the best maritime routes around the region, according to the time of year. There is also an inset map highlighting the rivers and southern islands of Singapore.

This late 19th century map of Southeast Asia shows the best maritime routes around the region, according to the time of year. There is also an inset map highlighting the rivers and southern islands of Singapore.

To aid navigation, this map shows small islands, shoals and reefs, maritime routes for use during monsoons or at particular times of the year, bathymetry (sea depth), past explorers’ routes, shipwrecks and text about monsoons, typhoons and currents.

An early 19th century map, with the regions of Southeast Asia marked with different colours. Interestingly, Cambodia and modern Vietnam (labelled here as Cochinchina and Tonkin) are grouped with China.

Map focusing on the passages between the islands of maritime Southeast Asia. Many 18th century routes are labelled with the ship/captain’s name and date, and there are notes on some shoals and reefs recording names, details and incidents/shipwrecks.