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On this map of Southeast Asia, British colonial territory is highlighted within red borders: the Straits Settlements (Singapore, Malacca and Penang) on the west coast of the Malay Peninsula; and British Burma (Chittagong and Aracan, and Tenasserim).

This map of the Straits of Malacca features shoals and reefs, bathymetry (sea depth), drawings of side views of landmark mountains (elevations) and written observations, all designed to aid navigation.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

This 1550 map by the German cartographer Sebastian Münster (1488–1552) was based on the work of the 2nd century geographer Ptolemy. There are many inaccuracies, especially in scale and the locations of mountain ranges, but the region is recognisable.

This 1550 map by the German cartographer Sebastian Münster (1488–1552) was based on the work of the 2nd century geographer Ptolemy. There are many inaccuracies, especially in scale and the locations of mountain ranges, but the region is recognisable.