Spent the morning laying out Jake's trench in WSM. After much deliberation and consultation, I've decided to concentrate resources this season in Precinct A. Room M recommends itself for several reasons: it will afford a contiguous architectural picture extending from Room C to room N; judging by WSM (2005) the room appears to be relatively shallow; part of the room has already been excavated but was not drawn; this same trench in 2005 attests to good preservation. The trench is 15 x 6 m and bisects the room along a NW to SE axis. Jake will supervise and will begin from locus 100 (to distinguish from the operation opened in 2005). In WSN, I closed locus 23 and opened locus 24 just beneath it, again in the northern quadrant of the trench. The matrix is still a dark brown silt--perhaps slightly lighter in color than locus 23, but not appreciably so. I changed loci in order to control for material densities and not to distinguish a distinct strata. Meanwhile, in WSI2 the day was spent troweling and cleaning the stone features in order to return the trench to the condition in which Elizabeth left it in 2010. In the midst of this work, two very large boulders from the lowest course of the southeast wall fell into the trench, onto the "platform" feature in the east corner (locus 23). The workers were able to return them to their approximate locations, but the integrity of the wall is compromised and the sooner it can be drawn, bolstered, and covered, the better. By the end of the day, we had reached the level of the tarp that had been laid across the trench in nearly all sectors.