It was a German expedition, done in 1928 and 1929.
It shows the possible route of the German expedition.
He also served as geologist of a German polar expedition.
Strangely enough the route of the 1868 German expedition is not engraved in the image.
Probably first seen by the German expedition 1873-74, under Dallmann.
Later in that volume he published two maps of the route sailed by the German expedition.
A German ethnographic expedition visited this town in April 1935.
In April 2003, a German expedition claimed to have discovered his last resting place.
Discovered and named by the German expedition under Dallmann, 1873-74.
A German expedition is in the African jungles doing an unidentified mission there.