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Navigation map of the Riau Roadstead (off west coast of Bintan, Riau Archipelago): a body of water sheltered from tides/currents, for ships to anchor. Bathymetry (sea depth) and various obstructions and landmarks (hills, buildings, trees) are shown.

Map of the residency of Benkoelen (Bengkulu, southwest coast of Sumatra), over 10 sheets, with an inset map of the city of Bengkoelen (Bengkulu). Types of crops—coconut, rice, alang-alang, nipah palm, coffee—are marked. Sheet number 8 is missing.