Today we spent cleaning rocks all day. There are a number of small (e.g. 10-15 cm long) rocks in the N corner of my trench, which appear to be some sort of fall. Whether they are wall fall from perhaps the interior of a large double-faced wall, or simply crap from the top of the berd remains to be seen. Emerging from the dirt along the baulk between the N and E corners is a happily rectilinear line of rocks more than one course deep, so I am hopeful that we may have a wall on that side. It's the only clear candidate so far, though there is also a rectilinear line of rocks near the border with T20, near where the small cup from yesterday was found. That line may or may not extend past the four rocks currently visible, but it may be in the running for the designation of "wall." I concentrated on drawing the N corner, as the most rocks can be found there, and I am ready to remove a number of them, after a little more consideration and drawing tomorrow morning.