Port Wall

Town wall built entirely of unworked stone rubble. The area enclosed is 130 acres. The wall originally ran from the west end of the Castle to a point on the river bank to E, thus enclosing the peninsular. It is over two-thirds of a mile long, over 2m thick and from about 5 to 7m high. It was embattled with a wall-walk. Bastions were c 9m in diameter and D-shaped without arrow slits and open at the back, formerly with timber staging. Only wall openings are a series of square slots to drain water from the wall-walk. In places some coping stones survive. From a square turret in Castle Dell the wall extends S. It is clearly visible in the car-park and turns SE to link with the Town Gate, on either side of which it is incorporated into other buildings. It is visible again on high ground S of the relief road and then along the crest of the quarry by the station; in this latter section are five bastions.