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Map of the crops—coconut, alang-alang, rice, nipa palm, bamboo—grown along the Mempawah River (west coast of Borneo). There are also large areas of swampy forest, Malay mosques, shrines and graveyards, and Chinese villages, temples and graveyards.

Map of the island of Nias off the west coast of Sumatra. Nias and Muslim villages are marked separately; large interior areas are left blank (‘Niet onderzocht [Not researched]’). Anchor points and side views of hills (elevations) are for navigation.