 At the succession of King Henry I, the new king imprisoned Ranulf in the Tower of London on 15 August 1100 on charges of embezzlement. His custodian, William de Mandeville, allowed the bishop to escape on 3 February 1101. Flambard was not only the first inmate of the prison, but also the first person to escape from it. A popular legend represents the bishop as descending from the window of his cell by a rope which friends had smuggled to him in a flagon of wine. Ranulf gave the wine to his guards, and after they were drunk and asleep, climbed down the rope to escape. His friends had arranged a ship to transport Ranulf, some of the bishop's treasure, and the bishop's elderly mother to Normandy. He took refuge across the English Channel with Henry's brother Robert Curthose, where he became one of the duke's principal advisors. King Henry dispossessed Ranulf of his lands at Whitsun in 1101, and the new Archbishop of York Gerard deposed him from his bishopric. The Archbishop of Canterbury, Anselm arranged for Flambard's trial in a papal court for simony, and a papal decree was issued against Ranulf.
