Spent most of today working in locus 07, the 1.25 m area parallel to the northwest wall. It is now clear that the line of stones that runs parallel to the nw wall is not wall fall but a built feature. In most places, two courses of this internal, single-coursed wall have been exposed. But it is not a particularly well-built feature; some of the stones in the top course are a bit wobbly. Toward the end of the day, we resumed in locus 06, bringing it down to the level of the bottom elevation of locus 08. Found the first charcoal sample of the season. Quite interestingly, the northwest wall appears to have another, fourth course emerging. I think this is the deepest of the partitioning walls thus far excavated in precinct A.