Today we spent a good part of the day cleaning, troweling out the walls better and also digging and cleaning to the W of the central room. The area to the W is still puzzling, since I don't know what to make of the clay surface that seems to be flanked by the narrow, flat-faced stones (which would be a pretty poor wall, considering the gaps between them). The cleaning took a large part of the day, though we also got rid of the first, tube-shaped, clay feature, after I drew it again.