Brownish silty matrix beneath Locus 29 in the area of the doorway leading into WSAC in the SW wall. The matrix had a lot of small to medium sized stones, which were doorway fill apparently from both sides, as the door was blocked at abandonment. The doorway appears to have the consistent 1.4 m width seen in the west settlement. Opened 20/7/11. See notebook for sketch and elevations; top given is lower northern point.