On 15 July 2016 during rain, Chris F distinguished a small, loosely compact layer of soil of slightly different colour (light yellowish brown) sitting on top of SU 16011 in the NE corner of our quadrant. The layer is oddly flat and compact looking in the rain, but does not appear to be compact enough to be a floor. In dry conditions on 18 July 2016, the SU appears to slope up into the corner of the walls along the exterior (SU 16003 and 16004). (ELM, CF)