Following the demolition of nos 76-78 Northgate Street in 1989, an area was cleared by machine against the southern boundary of the site to determine how much of the town wall still survived and to locate the depth and position of the remains. The full width of the wall was proved to survive, including the front and rear faces. The rear face was the best preserved. The coursing was set in opus signinum. It was not clear if the same was true of the front face.<1>