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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.