From Register of Scheduled Monuments: Earth bank and ditch. Sandown Bridge which stood outside the Sandown Gate is partly 16th century but was widened eight years ago. The gasworks have gone, but at a point just east of Knightrider Street the course of the town walls is a flat recreation area with a path leading up to the start of the Town Walls walk at the north east corner. The wall turns in a south westerly direction at this corner and this is The Bulwark. At this point the earth bank has been fortified and the masonry is visible along this stretch to the Sandown gate. Just past the point where the Sandown road passes through the wall at the beginning of the Millwall Stretch, a small excavation has been fenced off. Near the site of Newgate and in the scheduled area is an electricity sub station. In 1451, the E corner of the town was fortified with a two-storey erection, armed with guns and know as the Bulwark. It was to prove a considerable obstacle to the french attack of 1457, although the town was eventually sacked. At the NE corner of the Bulwark, the bank is faced with modern stonework, but further S along the Bulwark original masonry is visible, but much smothered in vegetation and in places patched with brick, the area of the old excavations by Sandown Bridge is now overgrown. The Mill wall stretch of the defences is most impressive with the bank rising steeply above the ditch to a height of over 7m.