On a north-west facing slope above Nant Ceiliog, on moorland to the north of Abercraf, lies a small enclosure. It measures 5.9m (NW-SE) by about 2.5m within roughly coursed rubble wall now largely tumbled. Where preserved it stood to about 1m high and was 0.75m thick. The enclosure appears to have been built out of local scree. To the immediate east lies a second structure measuring 3.9m (NE-SW) by about 2.2m within walls reduced to rubble banks on the north-east and south-west sides, a revetment of blocks on the uphill south-east side, and a wall of roughly coursed rubble 0.75m high and 1m thick. Like its neighbour this structure has been carved out of scree deposits accumulating at the foot of ground rising steeply to the south-east.

David Leighton, RCAHMW, 20 July 2011