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Map of the Mambare River from Mount Victoria to the sea at Duvira (or Traitors) Bay, British New Guinea. Villages, bases, camps and stores are marked, and there are notes on terrain (‘Low Hills’), vegetation (‘Betal Palms’), river width, rapids etc.

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.

Three maps on one sheet of the Fly River in British New Guinea, from the mouth to where it meets the Palmer River. Bathymetry (water depth) and sandbanks are marked at the mouth and landmarks—hills, vegetation, villages—are noted along the length.