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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.

Two maps showing the distribution of rodent and ruminant animal species, including in Southeast Asia. Lines show the geographical range of individual species, alongside illustrations of the animals featured.

Mountain chains are represented by black lines; volcanoes by black dots. Three insets maps: expansion of Reguain—island of Taung-ywa, off the coast of Myanmar—due to volcanic activity; geology of Java (with heights of mountains); volcanoes of Luzon.

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.