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.
Wall fragment from a plain amphora.
Lightly incised on the outside: Well in cistern to west of Tholos, dump. Leica PD 1133-6(D 44), DA 15232 ... 11 June 1937