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| West Branch of the Great Drain; the new course to the right, the old course to the left beneath Building C ... north Horizontal (normal) ... 1937 |
| Polygonal wall beneath later course of Great Drain ... east Horizontal (normal) ... June 1937 |
| The West Branch of the Great Drain in its early and late courses ... southwest Horizontal (normal) ... June 1938 |
| Great Drain opposite the northeast corner of the Metroon, detail of masonry ... southwest 1470 Horizontal (normal) ... 19 July 1961 |
| Section opposite south part of the Eponymous Heroes. Cover slabs removed ... west 1903 Horizontal (normal) ... August 1967 |
| Section opposite south part of the Eponymous Heroes. Cover slabs removed ... southwest 1905 Horizontal (normal) ... August 1967 |
| Section opposite the south part of the Eponymous Heroes. Cover slabs removed. Details of wall ... west 1907 Horizontal (normal) ... August 1967 |
| Section opposite the south part of the Eponymous Heroes. Cover slabs removed. Details of wall ... west 1908 Horizontal (normal) ... August 1967 |
| Section of the Great Drain opposite the Eponymous Heroes, interior view ... south 1909 Horizontal (normal) ... August 1967 |
| Section of the Great Drain opposite the Eponymous Heroes, interior view ... north 1910 Horizontal (normal) ... August 1967 |
| Great Drain west of the Eponymous Heroes. Isometric drawing ... W.B. Dinsmoor, Jr ... PD 2286 Horizontal (normal) ... 1974 |
| Cutting for the Great Drain, after clearing, before laying pipe ... south 2172 Horizontal (normal) ... 23 November 1953 |
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