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A map of the residency of Soerabaja (East Java) divided into regencies, departments and districts. There are large fishing ponds around the coasts. An inset map shows distances between settlements by road, tracks and paths.

Map of Upper Burma, showing the borders with Assam (India), China and Siam (Thailand), as well as internal administrative borders. Mountains with their heights, settlements, rivers and railways (completed, proposed and under construction) are shown.

Map of the district of Ruby Mines in northern Burma (Myanmar) featuring the Irrawaddy and Shweli rivers. High points are marked with their heights so they can be used for triangulation. As the name suggests, the district was known for its rubies.

Map of the Malay state of Johor, and Singapore. The route of a proposed railway north from Johor Bahru is shown. Apart from rivers and mountains, much of the terrain is blank, with labels such as ‘Unexplored Hill Country’ or ‘Dense Jungle and Swamp’.