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Map of eastern New Guinea, showing the routes—mainly along rivers—explored by Sir William MacGregor, the administrator of British New Guinea. The borders with the German colonial territory (Kaiser-Wilhelmsland) and Dutch New Guinea are also marked.

Two maps of Siam (Thailand). The larger map shows routes through mountain passes from Siam to the city of Tavoi (Dawei, on the west coast of Myanmar). The smaller map is marked with trade routes around Lower Siam (Southern Thailand).

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’.