After this trip, Rohlfs was the first European to cross Africa from Tripoli across the Sahara desert via Lake Chad and along the Niger River and to present-day Lagos on the Gulf of Guinea from 1865-1867.
After this trip, Rohlfs was the first European to cross Africa north to south. His route took him from Tripoli through the Sahara desert, over Lake Chad, along the Niger River to the Gulf of Guinea from 1865-1867.