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| Photograph, showing wall face and cutting. Looking north ... AMS Horizontal (normal) |
| Looking east. C- bedrock cutting at back of drain wall where it has fallen ... AMS Horizontal (normal) |
| East drain wall looking south. C- line of bedrock cutting behind wall showing packing and wall face ... AMS Horizontal (normal) |
| Looking south. Upper corner, bank of post-Sullan drain well. C- cutting parallel to drain. 93- 93 drain. P- stone packing in it ... AMS Horizontal (normal) |
| Mouth of 93 drain, looking east, showing patch (P) in face of east drain wall, / ... / (D) ... AMS Horizontal (normal) |
| Looking south. D- top of east wall of drain. W- wall at west end of 93 drain ... AMS Horizontal (normal) |
| Dam at Great Drain end ... AMS Horizontal (normal) |
| Looking north. B- block in situ at southwest corner of Tank foundation ... AMS Horizontal (normal) |
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