In 1608, when O'Doherty's Rebellion broke out in Ulster, the settlement of Derry was captured and burnt by the rebels led by Sir Cathaoir Ruadh Ó Dochartaigh (Sir Cahir Rua O'Doherty). Although Bishop Montgomery and Ó Dochartaigh had been on good terms before the rising (both had quarreled with Sir George Paulet, the Governor of Derry, who is often blamed for provoking the rebellion), the rebels burnt the Bishop's house and his library of two thousand books because of their supposedly heretical content. The Bishop's wife and sister were taken as hostages by the rebels, but were eventually freed by Crown forces.