 On the death of Rufus in 1100 , Ranulf was imprisoned in the Tower of London by Rufus ' successor Henry I of England . Ranulf was a convenient scapegoat for the financial extortions of Rufus ' reign . He became the first prisoner to escape from the Tower and went into exile in Normandy with Rufus ' and Henry 's older brother Robert Curthose , the Duke of Normandy . Ranulf became a leading advisor to Robert , and assisted in his unsuccessful invasion of England , an attempt to oust Henry from the throne . The brothers reconciled , but although Ranulf was restored to office he spent the next few years in Normandy , returning only after Henry had defeated Robert at the Battle of Tinchebray . Ranulf subsequently retired from political life , with only occasional appearances in public . He remained active in ecclesiastical affairs , attending councils and working to defend the rights of his see . 
