Ten Years' Captivity in the Mahdi's Camp 1882-1892
CHAPTER XI.
REVOLT AGAINST THE DERVISHES.
The black soldiers of the old Sudan army--They revolt against the Dervishes in El Obeid--And march off to Dar Nuba--The emir Mahmud pursues and is slain--Ohrwalder quits El Obeid for Omdurman--Zogal and Abu Anga at Bara 189