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Hand-drawn map of routes through the Iris-straat (Iris Strait) and Triton’s-baai (Triton Bay) in New Guinea. Bathymetry (sea depth) and reefs are shown, and there is an elevation (side view) of the islands and hills seen at the bay’s entrance.

Plan of improvements to the pier at the port in Batavia (Jakarta): new parts added in 1822 are labelled AB; numbers record the change in water depth (red is before the improvements; black is after). Planned future works (labelled BC) are also shown.

Plan of improvements made to the pier at the port in Batavia (Jakarta): red lines show new parts added in 1822; numbers record the change in water depth (red is 1818; black is 1823). Planned future works and the ‘Waterkasteel’ fort are also shown.

Plan of improvements made to the pier at the port in Batavia (Jakarta): red lines show new parts added in 1822; numbers record the change in water depth (red is 1818; black is 1822). Planned future works and the ‘Waterkasteel’ fort are also shown.

A map to aid in the navigation of the rivers leading to Saigon (Ho Chi Minh City, Vietnam). Details include bathymetry (water depth), currents, and a side view (or ‘elevation’) of hills to use as a landmark. Tides are described in written remarks.

Made for ‘A History of Java’ by Sir Stamford Raffles, this map includes a list of administrative districts with their populations, and four inset maps of harbours. Another inset map shows rocks and minerals, mountains and volcanoes, and teak forests.

Made for ‘A History of Java’ by Sir Stamford Raffles, this map includes a list of administrative districts with their populations, and four inset maps of harbours. Another inset map shows rocks and minerals, mountains and volcanoes, and teak forests.

A plan of Batavia in the early 19th century, with the castle, church, dock yard, timber yard and hospital highlighted on the map’s legend. Also shown is the canal flowing through the city to the port, where the sea depth (‘soundings’) is indicated.

Hand-drawn map of islands in the Riau Archipelago, with bathymetry (sea depth) marked. It features side views of hills (‘elevations’) to use as landmarks, including ‘Jehore hill’, probably in Johor at the southern tip of the Malay Peninsula.

This map features eight expedition routes across the South China Sea from 1752 to 1763. The web of lines is a rhumbline network, and bathymetry (sea depth) is marked. The place names are in French, but with an English title and notes.