Three sides of a rectangular building are located above the south bank of the stream on a terrace the edge of which forms the fourth, north-east, side. The wall dimensions are 4m (NW), 5m (E) and 3m (SE). The structure is only vaguely defined, the walls 0.75m thick and 0.3m high. The east wall incorporates slab facing stones. There is no obvious entrance or partition wall.
No extension at the NW end was noted. Here, the terrace edge is littered with formless scatters of stone & boulders.

David Leighton, RCAHMW, 30 October 2008