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Map of the Indian Ocean dominated by a rhumbline network—a web of interconnected lines used to help plot routes—with a compass rose at the centre. At the top there are (incomplete) drawings of people with text in Dutch, French, English and Spanish.

This mid-17th century map features three long rivers flowing south through mainland Southeast Asia. Their source is a lake named ‘Chiamai Lacus’, which was one of a number of mythical lakes once thought to exist in southern China.