From the Register of Scheduled Monuments: West Gate: built between 1375 and 1381. Two storeys and is flanked by drum towers, with loops(?) in three stages, pointing in all directions. The gateway itself has stone quadripartite vaults with intermediate ribs. Outer opening was defended by a portcullis and stout doors as well as by deep machiolations which were versed from the parapet. Appears to have been no barrier in the inner opening towards the city. Lateral doorways admit to the lower stages of tower and in the case of that in the N to a mural stairway leading to upper floors and parapet. The upper storey formed a large guardroom and had a wide fireplace in the S row built in and apparently a doorway communicating with parapet walk in the N. As before and see stone by stone survey by Canterbury Arch. Trust Castle to Northgate (A28): this is a long stretch of upstanding city wall of the 14th century. The walls and towers are of flint construction with some later brick repairs in places. For most of its length the walls are circa 4m high trough the stretch adjacent to the castle is less substantial, being circa 2.5m high. St Radigund St (additional area): short fragm,ent of unscheduled wall discovered when former Bligh's garage was demolished. At present waste ground and in poor condition. This is the stretch of wall running parallel to Church Lane from Northgate to St Radigund St. The eastely part is in the wall of St Mary Northgate Hall and stands to a reasonable height while the W part is only the lower part of the wall in a small piece of formal garden. Rectangular tower: the rectangular tower, called Sudbury tower, is of flint with stone quoins. Towards the W end of this section of city wall the flint walling gives way to brick.