It seems possible that the well ... was originally associated with the late Roman reconstruction of the Stoa, being later carried up to serve the Byz. houses. [Nbp. 364] Coins:
6 March 1939 #1-#9 ... Late 4th-early 5th century
Fillings in a well on south slope of Kolonos Agoraios. The shaft reached a depth of 20.28m., but produced no use filling. The lower part, from water level at 12.60m. to bottom, provided only mud and gravel ... Ca. 425-400 B.C.