Narrow trench in bedrock; one section found to NE of Circular Building west of the Stoa of Attalos, another (Q 8:1) beneath the terrace of the Stoa of Attalos opposite Pier 19. A single filling in both ... Ca. 450-425 B.C. and shortly after ... Agora XXXIV, p. 184 ... Hesperia 18 (1949), p. 343, no. 146 ... Agora XII, p. 396.