AM. removed the fallen stone layer from AC4, measuring each rock as it was removed (drawing). Possibly, the ashlars in this layer (Locus 3) were all in a continuous ceiling, not all of which survived. Uncovered a burnt/clayey surface sloping out of the northeast corner, with some in situ ceramics (this was locus 4). Generally we uncovered a level of clayey soil throughout the trench (Locus 5). Worked through locus 2 and 3 in AC3 to the top of the arch base in the east baulk. Day called on account of traumatic flesh wound.