Appears to be use filling from 3rd c. A.D., pre-Herulian into 4th c. or later. Lined with tiles. Coins:
6 May 1937 #1-#2 (disintegrated) ... Early 3rd-early 6th c.
Eugene Vanderpool ... In antiquity the area included in Section Φ lay outside the Agora proper and were apparently occupied only by houses and small buildings. The earliest period of which any considerable remains were found ... 25 Jan-17 Jun 1937