Roman Retaining Wall; Channel Drain; Tank ... ΝΝ-6 1167, 1168 ΝΝ 590 SS 8807 ΝΝ 591 SS 8808 ΝΝ 592 SS 8809 ΝΝ 593 SS 8810 ΝΝ 594 L 3734 ΝΝ 595 T 2012 ΝΝ 596 MC 570 ΝΝ:1939.0505:67 N 36885 ΝΝ:1939.0505:68 N 36886 ΝΝ:1939.0505:69 N 36888 ΝΝ:1939.0505:70 ... 5 May 1939