Manhole at 55/ΚΔ (Same system as O 19:2) ... 8 April 1938
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.