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A series of four maps of the Indian Ocean—one for each quarter of the calendar year—showing the direction and intensity of the winds, including around the seas of Southeast Asia. There are extensive explanatory notes.

From the second edition (1749) of ‘Atlas Portatif Universel et Militaire’ by the French cartographer Gilles Robert de Vaugondy (1688–1766), this map features the Philippines (in blue) and Maluku Islands (in red).

This mid-18th century map of the Philippine archipelago by the French cartographer and publisher Georges-Louis Le Rouge also features some of the Caroline Islands.

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.

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.

Four long rivers flow south through mainland Southeast Asia on this map: the ‘Menan’, ‘Manthabam’ and ‘Cosmin’ originate at a mythical lake (‘Chiamai Lac’) in southern China, while the ‘Mecon’ (Mekong) flows from the hills of Cochinchina (Vietnam).

Map of a small island chain off the west coast of Gilolo (modern Halmahera in the Maluku Islands, Indonesia). Italian text describes the larger islands (Ternate and Tidore) and the Philippines. From Vicenzo Coronelli's ‘Corso Geografico Universale’.

Four long rivers flow south through mainland Southeast Asia on this map: the ‘Menan’, ‘Manthabam’ and ‘Cosmin’ originate at a mythical lake (‘Chiamai Lac’) in southern China, while the ‘Mecon’ (Mekong) flows from the hills of Cochinchina (Vietnam).