Roman Retaining Wall; Channel Drain; Tank ... ΝΝ-6 1169, 1170 ΝΝ 602 L 3737 ΝΝ:1939.0506:16 N 36911 ΝΝ:1939.0506:17 ΝΝ:1939.0506:18 N 36912 ΝΝ:1939.0506:19 ΝΝ:1939.0506:20 ΝΝ:1939.0506:21 N 36913 ... 6 May 1939