This wall was used contemporaneously with the drainage system (sewer), placed on what was originally part of the road. As buildings enclosed the road, making a corridor, the wall was placed between 5386 and 5413. The small corridor was closed off on both ends by wall 5392 and a doorway (5412) which provided access from the south. The cement at the bottom suggests the tile feature 5331 was used as a gutter, then draining into the sewer to the east.