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Four-sheet topographic map of the residency of Probolinggo (East Java), with an inset map of distances between locations by rail and road, and a signal map. Crops, fishing ponds, sugar factories, and coffee and salt warehouses are shown.

A map of the watershed of the Bila and Pane rivers in northern Sumatra. In addition to many rivers/tributaries, mountains, roads, paths and administrative borders are marked. Side views of mountains (elevations) are shown to use a landmarks.

This map of Java and Madura is divided into administrative areas: residencies (blue lines), departments (green) and districts (yellow). The locations of government coffee and salt warehouses, as well as railways and tramways (red lines) are marked.

A hand drawn map of the province of South Sumatra, divided into administrative districts, and including the capital city of Palembang. Mountains and rivers are featured prominently, with a list at the top left indicating the heights of the mountains.

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.

Four-sheet topographic map of the residency of Probolinggo (East Java), with an inset map of distances between locations by rail and road, and a signal map. Crops, fishing ponds, sugar factories, and coffee and salt warehouses are shown.