Eugene Vanderpool ... After some years of excavations in the area around the Tholos and the Metroon, this report outlines the development and the history of this part of the Agora. Only the notebook pages from the 1938 excavation ... 1 Mar-6 Jul 1938
May be of Hellenistic origin when cistern system went out of use.
For a general note on the cistern see Nb. ΟΕ III, pp. 246 ff.
Objects from B 586 various depths (no subdivision): S 2324-S 2330,
P 34894, ... Late 2nd-early 6th c. A.D.