The walls were reinforced by fifteen hollow mural towers, placed from 75 yards to 125 yards apart, or at a “flyte shoot,”—explained to be within 400 yards, and here much less. They were rather more than half round—that is to say, their side walls were a little prolonged or stilted in plan, and they were 34 feet high, having a cruciform loop in front, and probably two others laterally. Of these, two at least remain and are accessible, though their upper half has been removed. The intervening curtain was 16 feet high on the interior, but it was built against the old English bank, which thus covered the lower 6 feet of the interior face, and served as a ramp. Besides the two towers already mentioned, which stood on the north-west face, the wall may be traced along the western side from Bishop’s Gate—now “the Commercial Road”—to the river bank. Where it has been pulled down the step remains, and the difference between the level within and without is brought to view. Of this wall the part from the Friar’s Gate to the river is open to view from the exterior paddock. The ditch has been partly filled up, but the wall remains about 12 feet high, unaltered, save by the removal of its upper 4 feet or 6 feet. At regular intervals along it of about 50 feet are broad pilaster buttresses, of slight projection, and without sets-off. These die into the wall below its present top. There do not appear to have been any mural towers on this part of the wall. Some kind of manufactory conceals the termination of this wall upon the river, where there was probably a tower; and from this point to the bridge a line of modern houses effectually conceals any foundations that may have escaped. The tracing out the town wall, or what remains of it, though aided by parallel streets, representing the rampart within and the ditch without, is a delicate operation; for the lowest houses of the city are here found, and the inhabitants seem to drive the trade of those who, at Jericho, dwelt in a similar locality. That part of the wall showing the pilasters is, no doubt, the original Norman wall. The part beyond, or, at least, the towers upon it, is probably of the time of Henry III. The wide modern street, called Commercial Road, which takes the place of the old Bishop’s Gate, has, of course, caused the removal of all traces of the wall near the site of the gate; but the line may still be traced round the eastern quarter of the city as far as the angle of the castle. Here, as before, are two roads—one inside and one outside the line of the wall—the actual place of which is shown, sometimes by a few stones built into the walls of later houses, and sometimes by a dip of nearly 6 feet in level. Beyond St. Owen’s Gate the actual wall remains for some yards, and may be seen from the exterior road. It extends to the counterscarp of the castle ditch, where it ends abruptly, having been in part pulled down.