Spent most of today trying to level trench and expose more of Locus 5, in the eastern corner, which is of a different matrix than the rest of the trench, to see if it extended anywhere. In the morning the crew removed one pass of Locus 4 in the southern and western corners, which had been left from last week and not opened. This produced about 1 and a half bags of ceramics, and one of bone. This locus is still the dark, loamy matrix of 2 and 3. I drew the rock fallout while this was going on, specifically in the northern area of the trench and the southern row of three large stones, which appears to possibly extend into room AD. At the same time, the eastern corner at a depth of approximately 115 (bd 1) became more compact, with a few very fine pieces of charcoal, and a higher amount of bones. This locus has been screened, and I also took elevations (for which see notebook). Throughout the day as the crew began trowelling the surface I noticed that this same medium brown, more compact surface with scattered pieces of charcoal extended south, but not exactly any further west into the trench. It is possible that this is the top lens, or actual level of some floor that is more ephemeral in the rest of the trench, although the western and northern corners have yet to produce it. It does seem to correlate to the bottoms of large stones in both the NE and SE walls that it abuts, but it is unclear if I have actually reached the floor level. After lunch, some of the crew were trowelling and cleaning the rockfall while Ardzrun worked in the northern corner, and he brought the level down about 30 cm, exposing two to three more lines of stones in the NE wall, and several very large, humerus-type bones extending from the NW baulk. For elevations, see notebook (which I took at the end of the day, after sweeping the surface). The matrix in the northern corner is still very dark and loose, suggesting that it either is some level below the 'floor' in the eastern corner, or that we passed it already. At the end of the day, I took elevations to see how the surface of the trench compares, and there is still a noticeable slope, particularly in the northern and western corners.