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Navigation map of the waters and straits around some of the islands of the Riau Archipelago, between Sumatra and Batam. Bathymetry (sea depth), current and tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked.

Navigation map of the waters and straits around some of the islands of the Riau Archipelago, between Sumatra and Batam. Bathymetry (sea depth), current and tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked.

A map of the religions of the local peoples of the Dutch East Indies, with areas marked as Christian, Muslim, ‘heathen’. With population figures, including for Protestants and Catholics, and locations of missionaries and other religious teachers.

A mid-19th century map of Celebes (Sulawesi) and the Lesser Sunda Islands, divided into colour-coded administrative districts.