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Map of part of the east coast of the Gulf of Papua, with river mouths, shoals, bathymetry (water depth). On land, notes on terrain (‘Hills 100 to 150 ft. high’), land (‘Good soil’), vegetation (‘Nipa and Sago Palms’) and people (‘Ipikoi Tribe’).

Map of parts of Fergusson and Normanby islands (east coast of New Guinea). Bathymetry (sea depth), reefs and shoals are marked, along with landmarks (mountains, villages, trees). Territories of two indigenous tribes—the Subia and Manayaya—are shown.

Map of British New Guinea with notes on the terrain (‘Low country’), vegetation (‘Mangrove, Nipa and Fan Palms’), crops (‘Small plantations Sugar cane & Taro’), coastal features (‘Coral and Sand flats) and people (‘Friendly tribe’, ‘Dariamo Tribe’).

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.

Map of an expedition along two rivers on the southern coast of British New Guinea, with notes of terrain (‘Undulating country’), vegetation (‘Coconut Palms’) and wildlife (‘Flying Foxes’). More details have been added by hand (‘Ridge about 10ft.’).

From August Petermann's ‘Geographische Mittheilungen’, this map of New Guinea and neighbouring islands is marked with a maritime route from the western tip of New Guinea that is labelled ‘from Batavia to Hong Kong in 35 days’ and dated 1846.

This detailed map of the Dutch East Indies in the mid-19th century contains a great deal of information: topographical details, settlements and administrative areas, roads, railways and maritime routes, telegraph lines, inset maps etc.

Map featuring two maritime routes by Dutch explorers along the north coast of New Guinea: Jacob Le Maire and Willem Schouten (1616); and Abel Tasmanin (1648). (From ‘Algemeene Atlas van Nederlandsche Indie [General Atlas of the Dutch East Indies]’.)

Chart of the Indian Ocean, showing climate and weather-related data, including around the seas and straits of Southeast Asia where trade routes are marked, along with monsoon and typhoon regions, and currents during the different monsoon seasons.

Southeast Asia is shown on sheets two and three of this 12-sheet map of the Indian and Pacific oceans, including detailed inset maps of the straits of Singapore, Bangka, Gaspar and Sunda, with bathymetry (sea depth), shoals, reefs, anchorages etc.

Two maps. One features most of the world, but with Borneo, Philippines and most of mainland Southeast Asia missing, though there is an inset map of Penang. The other is a navigation map of the strait at Penang, with bathymetry and elevations.

Map of the Indian Ocean dominated by a rhumbline network—a web of interconnected lines used to help plot routes—with a compass rose at the centre. At the top there are (incomplete) drawings of people with text in Dutch, French, English and Spanish.