Great Drain, East Branch, beneath the "Commercial Agora". For the appellation "Commercial Agora" see Hesperia 22 (1953), pp. 35-36 and Hesperia 23 (1954), pp. 48-50 ... AMS east 1256 Horizontal (normal) ... 21 Apr 1953
Hydraulic Unknown Limestone (Polygonal Masonry) Good, long stretches preserved ... Ca. 500 B.C.
