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Longitude is indicated in two different ways on this mid-18th century map: along the top border, it is shown in degrees (number of degrees east of London); more unusually, along the bottom border, it is shown in time (number of hours east of London).

Longitude is indicated in two different ways on this mid-18th century map: along the top border, it is shown in degrees (number of degrees east of London); more unusually, along the bottom border, it is shown in time (number of hours east of London).

A mid-18th century map showing mainland Southeast Asia divided into regions such as Pegu, Ava and Aracan (Myanmar), Siam (Thailand), Laos, Camboie (Cambodia), Cochinchine and Tunquin (Vietnam), and Malaca (Malaysia).

This mid-18th century map of Asia has a stereographic projection to aid in navigation. There is also an illustration featuring two Asian men depicted as warriors, with a robed woman, as well as a large lizard.

Interestingly, this map from the year 1700 shows the world as the Greeks and Romans knew it. Therefore, Southeast Asia is labelled as 'PARTS UNKNOWN TO THE ANCIENTS' and lacks place names e.g. Sumatra is named ‘Taprobana I. according to some’.

Four long rivers flow south through mainland Southeast Asia on this map: the ‘Menan’, ‘Manthabam’ and ‘Cosmin’ originate at a mythical lake (‘Chiamai Lacus’) in southern China, while the ‘Mecon’ (Mekong) flows from the hills of Cochinchina (Vietnam).

This early 17th century map features a number of mythical lakes that were once thought to exist in southern China. One of these lakes feeds three rivers—labelled ‘Menam’, ‘Manthabam’ and ‘Cosmin’—which flow south through mainland Southeast Asia.

This 17th century map features a number of mythical lakes once thought to exist in southern China. One of these lakes (‘Chiamai Lac’) feeds three rivers—labelled ‘Menan’, ‘Manthabam’ and ‘Cosmin’—which flow south through mainland Southeast Asia.