It may perhaps be assumed that in the 5th c. the Romans cleaned the well to 25.30m., thus removing 2nd c. and subsequent fill, and then began to reuse the shaft. Coins
20 May 1938 #6
21 May 1938 #1
25 ... POU 1st c. and 5th-6th c. A.D ... Ψ ... Ψ:28/ΜΗ