 Complete the following phrase:  Burroughs and Willoughby are thrown into a dungeon in Omdurman with other enemies of the Khalifa. Still playing the addled Sangali, Faversham surreptitiously gives them hope of escape and passes them a file, but arouses the suspicions of the guards. He is flogged and imprisoned with the others. He reveals his identity to his friends and organizes an escape during 