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| Isometric drawing of the Great Drain west of Eponymous Heroes ... W.B. Dinsmoor, Jr ... 87-533 87-533 Dirty Heavy Tracing Paper Drafting Ink ... 1974 |
| Isometric drawing of the Great Drain west of Eponymous Heroes ... W.B. Dinsmoor, Jr ... 87-533 87-533 ... 1974 |
| Great Drain west of the Eponymous Heroes. Isometric drawing ... W.B. Dinsmoor, Jr ... PD 2286 AMS ... 1974 |
| Hydraulic Unknown Limestone (Polygonal Masonry) Good, long stretches preserved ... Ca. 500 B.C. |
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