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Map of the residency of Pekalongan, Central Java, divided into two regencies (Pekalongan and Batang) and 12 districts. The southern half is dominated by mountains, with more towns in the northern half near the sea. Sugar factories are marked.

Map of the Riouw (Riau) Residency, Sumatra. The border between Riau and the island’s west coast is marked in red ‘as far as it is known [voor zoo verre die... bekend is]’, ending abruptly in the unexplored mountains near Lake Toba, northern Sumatra.

On this map of the northern tip of the Minahasa Peninsula, the roads have been added in pencil after the map was printed. Similarly, the elevation (side view) of the peninsula’s mountains has the route of a journey added in pencil.