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British New Guinea is highlighted in red on this map of New Guinea and Australia, with German and Dutch colonial areas also partially shown. There is a line marking the boundary between the British and German spheres of influence.

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.

New Guinea is divided between British, German and Dutch colonial powers on this map of New Guinea and Australia. There is a line marking the boundary between the British and German spheres of influence. Bays and islands around the coast are named.

The first two sheets of this eight-sheet map focus on British New Guinea, with German and Dutch colonial areas of New Guinea also shown in part. There is a line marking a proposed change in border between Dutch and British territory.

Map of British New Guinea, focusing on the sea (islands, shoals, reefs), coast (settlements, bays), mountains and land (‘dense forest’, ‘timbered with Eucalyptus’). Inset maps of Port Moresby, Samarai Island, and the whole island of New Guinea.

Map of British New Guinea showing the boundary with Kaiser-Wilhelmsland (German New Guinea) as agreed on 6th April 1886. The boundary with Dutch New Guinea is also marked. Most detail is around the coast, with the interior left mainly blank.

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.