A caravan depôt in the Soudan, just above the confluence of the Blue and White Niles, 1100 m. S. of Cairo; was an active slave-trade centre, and commercially important; was captured by the Mahdists in 1885, when General Gordon fell; retaken by Lord Kitchener in 1898; lately has been superseded by Omdurman on the opposite bank of the Nile.