Near the end in NT01 A - still working on A9, but everyone is convinced that it is a floor since it is very dense orange clay. It is not an even surface slopes down as you move north, and we have only traced it out near the south baulk so far. More beams here, but small and burned all the way through. Found a ceramic wheel (?) here. In B, continued B12 until we found a line of stones that may be another wall, so we began two separate loci - B17 and B18 - one for each side of the wall. **Established a new datum today in B - the first one is now too high to be of any use. The new datum is 2166.322**