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Map of the Tunquin River (Red or Hong River) from the city of Cacho (Hanoi, Thailand) to its mouth. At the mouth, bathymetry (sea depth), shoals and anchor points are marked. A place named Hean is labelled as an English and French trading post.

Map of the Tunquin River (Red or Hong River) from the city of Cacho (Hanoi, Thailand) to its mouth. At the mouth, bathymetry (sea depth), shoals and anchor points are marked. A place named Hean is labelled as an English and French trading post.

Early navigation map of the South China Sea. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation. A route around the Gulf of Thailand is marked with text and the dates 1643 and 1644.

An early map of the island of Borneo, depicting the natural landscape of mountains, forests, rivers and shoals, and also evidence of human habitation with houses representing settlements, and a port and shipping route along the northern coast.

An early map of the island of Borneo, depicting the natural landscape of mountains, forests, rivers and shoals, and also evidence of human habitation with houses representing settlements, and a port and shipping route along the northern coast.

An early map of the island of Borneo, depicting the natural landscape of mountains, forests, rivers and shoals, and also evidence of human habitation with houses representing settlements, and a port and shipping route along the northern coast.