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| Floor level and Drain 1, looking northeast ... AMS northeast 1220 Horizontal (normal) ... 11 Jun 2004 ... Floor level and Drain 1, looking northeast. |
| Drain 1, from the east ... AMS west 418 Horizontal (normal) ... 7 Apr 1932 ... Drain 1, from the east. |
| Drain 1 and Drain 4, from the north ... AMS south 673 Horizontal (normal) ... 27 May 1932 ... Drain 1 and Drain 4, from the north. |
| Dismantling Drain 1: Patches of floor ... AMS
Cf. 2004-10-19 different orientation Horizontal (normal) ... 2004 ... Dismantling Drain 1: Patches of floor. |
| Drain 1 at juncture with Drain 2, showing bridge ... AMS 685 Horizontal (normal) ... 19 May 1932 ... Drain 1 at juncture with Drain 2, showing bridge. |
| Drain 4, Drain 1, Subsidiary Drain 2, and Drain 2. From the south ... AMS north 673 Horizontal (normal) ... 1 May 1932 ... Drain 4, Drain 1, Subsidiary Drain 2, and Drain 2. |
| Drain 4, Drain 1, Subsidiary Drain 2, and Drain 2. From the south ... Scanned 2005 for the 75th anniversary exhibition and publication. 673 Horizontal (normal) ... May 1932 ... Drain 4, Drain 1, Subsidiary Drain 2, and Drain 2. |
| Drain 2. Juncture with Drain 1 and western end ... AMS 690 Horizontal (normal) ... 19 May 1932 ... Drain 2. Juncture with Drain 1 and western end. |
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