Today B has too many levels in it, so I am trying to level as much as possible and still keep all of my bags straight. Some last remnants of B12 were removed, and we continued excavating B17 to the north of Wall B20 and B18 to the south of it. Also expanded the trench to the south in order to remove the topsoil over Wall B4 - the one in the south section. This was done in preparation for the architect. In B18, found something that looks like a floor - uneven orange clay surface. In A, we are still trying to trace the orange clay floor -- we have it in the meter just north of the south baulk, but we are looking for it in the second meter now.