Well at 55/ΚΕ Period of Use dated to the last quarter of 5th c. B.C., Upper fill dated to the same (deposited later) in Agora XXX. Coins 1 April 1938 #10 ... Last quarter of 5th c. B.C.
Well at 56/ΚΖ, just south of the south wall of the northern Late Roman Building ... Second half of 2nd c. - early 3rd c. A.D.