Afterwards the castle was repaired again, and was besieged by William
II. when Robert Mowbray, Earl of Northumberland, took refuge there.
During the Wars of the Roses Bamborough was frequently captured and
recaptured, and in the various sieges suffered very severely.
In 1720 Nathaniel, Lord Crewe, Bishop of Durham, having purchased the castle, bequeathed it in his will for charitable purposes. The Bishop's trustees carried out a considerable amount of repairs, and at the present time the residential portion is frequently let by the trustees to tenants for varying periods.
[Illustration: Photochrom Co., Ltd.