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Scarce map of of the river system centered on Hanoi and the Gulf on Tonkin, from an early 18th Century Jesuit Source.

We were unable to find any references or information on the map. However, we were able to determine that Canu, the map's engraver, illustrated several reports of early French Jesuit Explorations. The map would appear to depict information provided to the Jesuits by local sources, rather than a more scientific mapping of the region.