 The passageway through the gatehouse was protected by a portcullis and possibly a set of wooden gates.The ground floor contained two guardrooms, each wide, and latrines, with spiral staircases in the corner of the gatehouse running up to the first floor, where relatively well-lit chambers with fireplaces probably accommodated the garrison's officers.The staircases continued up to the second floor, containing the castle's great hall, an antechamber and bedchamber, originally intended for the use of Thomas of Lancaster and his family.