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Navigation map of the mouths of the Koealoe (Kualu) and Panei (Barumun and Bila) rivers on the east coast of Sumatra. Large sand and mud banks, bathymetry (sea depth), bouys and currents are marked. On land, tall trees are shown to use as landmarks.

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’).

Map of part of the west coast of the Gulf of Papua, with islands, river mouths, shoals, bathymetry (water depth), notes to aid navigation. On land, notes on terrain (‘Limestone Hill’), vegetation (‘Pandanus & Nipa Palms’) and people (‘Paia Tribe’).