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Map of Collingwood Bay, north coast of New Guinea, with bearings to mountains, bathymetry (sea depth), shoals and reefs. On land, notes on terrain (‘sloping plains’, ‘Stiff clay soil’), vegetation (‘Casuarina trees’) and people (‘FRIENDLY TRIBE’).

A map recording five Dutch expeditions through the Karo Lands of northern Sumatra. The mountainous terrain is represented by contour lines, with peaks’ heights marked. The names of groups of the indigenous Karo people are shown in large letters.

Map of part of British New Guinea with notes on terrain (‘Swamp’), vegetation (‘Grass & wood patches with old gardens’) and people (‘Oru tribe’), and three elevation views of mountain ranges. Some villages are marked as having ‘resident teachers’.

A map recording five Dutch expeditions through the Karo Lands of northern Sumatra. The mountainous terrain is represented by contour lines, with peaks’ heights marked. The names of groups of the indigenous Karo people are shown in large letters.