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To aid navigation, this map shows small islands, shoals and reefs, maritime routes for use during monsoons or at particular times of the year, bathymetry (sea depth), tide information, shipwrecks, compass roses and landmark mountains at the coasts.

A world map showing winds, hurricanes and typhoons, including trade winds, calms, typhoon, monsoon and hurricane regions in Southeast Asia. An inset map shows the approach of the Rodriguez Hurricane towards Java in 1843.

Navigation map of the southern South China Sea, with bathymetry (sea depth), islands, shoals and reefs marked. There are four maritime routes to China marked, with notes on what months or monsoon season to use them. Inset map of Gulf of Thailand.

Navigation map of the southern South China Sea, with bathymetry (sea depth), islands, shoals and reefs marked. There are four maritime routes to China marked, with notes on what months or monsoon season to use them. Inset map of Gulf of Thailand.

The arrows on this map mark the direction of the seasonal monsoons experienced around the Sunda and Maluku Islands (mainly modern Indonesia) during the late 18th century. Each arrow has a label in French, indicating the month.

The arrows on this map mark the direction of the seasonal monsoons experienced around the Sunda and Maluku Islands (mainly modern Indonesia) during the late 18th century. Each arrow has a label in French, indicating the month.

Map dedicated to William Cowper, whose coat of arms sits atop the cartouche. It features two horses holding a crest with three martlets (mythical birds used in heraldry). The cartouche also features Asian traders. Monsoons are marked on the map.

This map showcases the colonial territories of Southeast Asia in the 18th century, with text detailing trading information and the products of each region. There are five inset maps featuring plans of specific trading ports.

This map showcases the colonial territories of Southeast Asia in the 18th century, with text detailing trading information and the products of each region. There are five inset maps featuring plans of specific trading ports.

This map showcases the colonial territories of Southeast Asia in the 18th century, with text detailing trading information and the products of each region. There are five inset maps featuring plans of specific trading ports.

The arrows on this map show the direction of the seasonal monsoons: each arrow has a label, indicating the month. The northeast coast of Borneo is labelled ‘A Desart [desert/deserted?] Coast’, while the south is labelled ‘Pepper Country’.

This map is dedicated to William Cowper, whose coat of arms sits atop the cartouche. It features two horses holding a crest with three red martlets (mythical birds used in heraldry). The colourful cartouche also features Asian traders.