Square pit in bedrock southwest of the Hephaisteion. Many marble chips from the construction of the temple of Hephaestus were found here together with a large quantity of pottery and other objects ... Ca. 450 B.C.
Ca. 390-380 B.C ... Hesperia Suppl. 5 (1941), 128-150, figs. 56-75 ... Agora XXX, p. 360.