Narrow trench in bedrock. Cf. Section Σ, p. 4358 (nb. XXII) same trench, same filling.
EV notes that the cutting probably.. to the "narrow cutting in bedrock". The filling seemed to be ca. 425-420 B.C ... Third Quarter to Last Quarter of 5th c. B.C.
Water deposit in Polygonal Drain (43-44/Γ-Ζ and martyra)immediately south of the south foundations of the Middle Stoa. Early branch of the original course of Great Drain. P 2248 added to this deposit by ... Ca. 420-390 B.C.
