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Navigation map of Kaiser-Wilhelmsland, in German New Guinea. It features bathymetry (sea depth), reefs and shoals, lighthouses (coloured red and yellow) and landmark mountains. A boundary divides German and British colonial territories on New Guinea.

Three maps of the Caroline Islands. One shows colonised areas in Southeast Asia: Dutch East Indies; British North Borneo, British New Guinea; German New Guinea; Philippines (Spain); Portuguese Timor. The route of the Challenger expedition is marked.