Associated with the Tholos.
Originally a well but after it had been in use for a short time the shaft was partially filled in and the upper part widened to form a large cistern.
The pottery falls into ... 335-250 B.C.
Investigations to the south of the Metroon, in the passageway between the Metroon and the Tholos; accumulated layers, from the Geometric and earlier periods to the 3rd and 2nd centuries B.C.
Cf. Hesperia ... Geometric to second c. B.C.