An extensive cistern system on the lower north slope of the Areopagus, south chamber with blind tunnel extending further south (south tunnel); north chamber; drawshaft further north, extends to north tunnel ... Ca. 320-240 B.C ... With exception of north tunnel (which contains nothing later than 300), all parts seem to have been filled at the same time.
... The cisterns and chains of cisterns must have been filled up at various times between the end of the 4th B.C. and the 1st c. ... Group B) (ΣΤ = 45/Β, 45/Ζ, 46/Ζ, cf. Also 42/Δ)