 First he travelled across the Togoland, then he went to Cameroon where he in 1884 made a successful ascent of Mount Cameroon together with Stefan Szolc-Rogoziński.While in Cameroon he discovered the Batanga River but soon after this he fell ill and returned to Germany.In 1888 he travelled to German New Guinea and became the first European to penetrate into inner New Guinea and climb the peaks of Finisterre Range.