Emil Riebeck
Emil Riebeck was a German explorer, mineralogist, ethnologist, and naturalist. He was born in Preusslitz to Carl Adolf Riebeck, an industrial magnate. He traveled to North Africa and Arabia several times, and in 1881 travelled with Georg Schweinfurth on an expedition to Socotra. He traveled with Adolf Bastian to the hills of Chittagong in 1882.
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Source: Wikipedia