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Navigation map of the mouths of the Koealoe (Kualu) and Panei (Barumun and Bila) rivers on the east coast of Sumatra. Large sand and mud banks, bathymetry (sea depth), bouys and currents are marked. On land, tall trees are shown to use as landmarks.

This map shows agricultural enterprises in eastern Java in the late 19th century. Land ownership, crops (cassava, kapok, peanuts, tobacco), factories (oil, sugar, coffee), and the offices of government officials are also shown.