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| Upper part of drawing: Houses A and B. Drawing to show types of construction used in the Great Drain and in the houses beside it. Lower part: east wall of drain opposite House A. Elevation and sketch plan ... H.S. Whipple ... PD 707 PD 717 Brown House in nb. (A), Blue House in nb. (B) Horizontal (normal) ... 14 Apr 1948 |
| Great Drain below with cover slab; above, "bridge block", earth and tumbled breccia blocks ... north Horizontal (normal) ... 14 Apr 1948 |
| Great Drain with east-west retaining wall and tumble behind and above ... south Horizontal (normal) ... 14 Apr 1948 |
| East-west retaining wall over Great Drain with tumble above ... southwest Horizontal (normal) ... 14 Apr 1948 |
| Upper part of drawing: Houses A and B. Drawing to show types of construction used in the Great Drain and in the houses beside it. Lower part: east wall of drain opposite House A. Elevation and sketch plan ... H.S. Whipple ... PD 707 PD 717 Brown House in nb. (A), Blue House in nb. (B) Horizontal (normal) ... 14 Apr 1948 |
| Great Drain below with cover slab; above, "bridge block", earth and tumbled breccia blocks ... AMS north Horizontal (normal) ... 14 Apr 1948 |
| Great Drain with east-west retaining wall and tumble behind and above ... AMS south Horizontal (normal) ... 14 Apr 1948 |
| East-west retaining wall over Great Drain with tumble above ... AMS southwest Horizontal (normal) ... 14 Apr 1948 |
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