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| Rectangular base adjoining the Great Drain to the east of the Tholos with drain ... east Horizontal (normal) ... 15 February 1938 ... Rectangular base adjoining the Great Drain to the east of the Tholos with drain. |
| Rectangular base adjoining the Great Drain to the east of the Tholos with drain ... AMS east Horizontal (normal) ... 15 February 1938 ... Rectangular base adjoining the Great Drain to the east of the Tholos with drain. |
| Wall of the Great Drain ... east Horizontal (normal) ... 21 March 1934 |
| Wall of the Great Drain ... AMS east Horizontal (normal) ... 21 March 1934 |
| West Branch of the Great Drain, showing change of construction technique in the east wall of the drain ... AMS east 8348 ... 11 Apr 1956 ... West Branch of the Great Drain, showing change of construction technique in the east wall of the drain. |
| West Branch of the Great Drain, showing change of construction technique in the east wall of the drain ... east 8348 Horizontal (normal) ... 11 Apr 1956 ... West Branch of the Great Drain, showing change of construction technique in the east wall of the drain. |
| East Wall of Great Drain ... AMS Horizontal (normal) ... East Wall of Great Drain. |
| East branch of Great Drain, from east ... AMS Horizontal (normal) ... East branch of Great Drain, from east. |
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