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A nautical chart of the Indian Ocean showing bathymetry (sea depth), including in great detail around the seas and straits of Southeast Asia.

Two separate maps showing the languages and dialects spoken on the islands of Bangka, and the Riouw (Riau) and Lingga archipelagos, in the late 19th century. On Bangka alone, there are 12 languages or dialects listed.

Map of the city of Padang on the west coast of Sumatra, with inset maps of the nearby islands, featuring residential, business, government and military areas. There are also agricultural areas with coconut, nutmeg, bamboo, nipa palm and sago palm.