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| View of the Great Drain ... AMS north Horizontal (normal) ... 21 March 1934 |
| Wall of the Great Drain ... AMS 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 |
| View showing conservation work done on the drain. Wall towards north has been built up and drain generally cleaned ... AMS north 8346 ... 11 Apr 1956 |
| West Branch of the Great Drain showing diagonal cutting through the wall of the Great Drain, for the Roman drain, after clearing away fallen stones ... AMS south 8349 ... 11 Apr 1956 |
| Middle drain to north of Building C before final clearing. West Branch of the Great Drain showing its two courses ... Publication says from the northeast. southwest 2564 Horizontal (normal) ... 21 May 1938 |
| Middle drain to north of Building C, as cleared ... AMS north 2567 ... 31 May 1938 |
| Middle drain to north of Building C, as cleared ... AMS south 2566 ... 31 May 1938 |
| Middle drain to the north of Building C, as cleared to bottom ... AMS south ... 24 May 1938 |
| West Branch of the Great Drain, early and late course ... AMS southwest Horizontal (normal) ... May 1939 |
| Limestone polygonal construction of west drain wall just south of the bridge ... AMS 2143 Horizontal (normal) ... June 1949 |
| Looking at the bridge. Corbelled west wall at left ... AMS north 2185 Horizontal (normal) ... June 1949 |
| Divergence of East-West Street and the Great Drain bridge ... AMS south 2190 Horizontal (normal) ... July 1949 |
| General view. North end of bridge over drain showing cuttings in face of long channel block ... AMS south 2183 Horizontal (normal) ... July 1949 |
| East-West Street and Great Drain bridge. Layer 8 cleaned ... AMS east 2070 Horizontal (normal) ... July 1949 |
| Looking in the Great Drain, showing its west wall built over the corner of an earlier house ... AMS south Horizontal (normal) ... 24 Apr 1948 |
| West Branch of the Great Drain ... AMS north 7463 Horizontal (normal) ... May 1948 |
| Great Drain bridged for the East-West Street ... AMS south Horizontal (normal) ... May 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 |
| View of the Great Drain and the related channels ... AMS Horizontal (normal) ... 12 May 1934 |
| Amphora packing over tiles of the Great Drain ... AMS Horizontal (normal) ... 12 May 1934 |
| Polygonal wall beneath later course of Great Drain ... AMS east Horizontal (normal) ... June 1937 |
| The West Branch of the Great Drain in its early and late courses ... AMS southwest Horizontal (normal) ... June 1938 |
| View of the Great Drain ... AMS southeast Horizontal (normal) ... 29 June 1935 |
| New course of the Great Drain, as found. The fork is visible in the middle foreground ... AMS south Horizontal (normal) ... 1937 |
| West Branch of the Great Drain; the new course to the right, the old course to the left beneath Building C ... AMS north Horizontal (normal) ... 1937 |
| 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 |
| View showing conservation work done on the drain. Wall towards north has been built up and drain generally cleaned ... north 8346 Horizontal (normal) ... 11 Apr 1956 |
| West Branch of the Great Drain showing diagonal cutting through the wall of the Great Drain, for the Roman drain, after clearing away fallen stones ... south 8349 Horizontal (normal) ... 11 Apr 1956 |
| Great Drain bridged for the East-West Street ... south Horizontal (normal) ... May 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 |
| West Branch of the Great Drain ... north 7463 Horizontal (normal) ... May 1948 |
| Great Drain bridged for the East-West Street ... south Horizontal (normal) ... May 1948 |
| Limestone polygonal construction of west drain wall just south of the bridge ... 2143 Horizontal (normal) ... June 1949 |
| Looking at the bridge. Corbelled west wall at left ... north 2185 Horizontal (normal) ... June 1949 |
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