The new Africa : a journey up the Chobe and down the Okovanga rivers : a record of exploration and sport (1897)
Schulz, Aurel, Hammar, August, Russell E. Train Africana Collection (Smithsonian Libraries) DSI · London : W. Heinemann · leaf 196
THE NEW AFRICA 172 In the early morning of next day, the 15th, the leader of the Okavango boys came to us with the news that he had heard … unknown regions beyond would inevitably lead to our being followed up, when probably the retreat would end in being a flight. To these chances we were not going to expose ourselves, so, arranging with the Mombokooshus to wait a little longer, I sent Franz and two of our best boys over to interview…
Botswana -- Description and travel
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.