Extracted from
John Hanning Speke, Die Entdeckung der Nilquellen : Reisetagebuch, Leipzig : Brockhaus, 1864
Comment
We recognize on the left the « Mond Gebirge » which border a lake named Rusizi to the north. It's Lake Kivu. According to this German map, the Moon mountains are Virunga volcanoes north of the city of Goma.