Well under Poros Building Drain at 62/ΛΣΤ, west of the Areopagus. Digging abandoned at 6.10m due to a collapse of the soft bedrock at the west. Small amount of supplementary filling was added in the upper ... Ca. 520-480 B.C ... Hesperia 20 (1951), p. 174 ... Hesperia Suppl. 46 (2011), p. 375 ... Agora IV, p. 237.