VERBEEK, R.D.M., Kaart van het Oostelijk Gedeelte van den Nederlandsch-Indischen Archipel. Orig. edn.
Batavia-'s-Gravenhage, Topographische Inrichting/Nijhoff, 1908 Imp.folio. Orig. clothbacked printed boards Portfolio, ties preserved, with 2 large coloured lithographed fold.-maps, 1: 3000.000, both with legenda and 18 centre-folded sectional geological profiles, each sized 70x34cm. ["Jaarboek van het Mijnwezen in Nederlandsch Oost-Indië", zevententwintigste jaargang, 1908, Wetenschappelijk gedeelte].
Both large coloured fold. maps depict. (:) Track-map of Verbeek's voyage 1899 through the Eastern part of colonial Indonesia (Sulawesi, the Moluccan archipelago and New Guinea), and a geological map of the region on the same scale. Rare. (porfol. soiled and rubbed at extremities, maps in excellent condition).