The cropmark south-west of Nant Fflyman is an oval or subrectangular ditched enclosure, 106m from north north-west to south-south-east by 90m. It is set on ground falling to the east, having a possible entrance gap on the south, where the circuit appears to be doubled. In the northern part of the interior is an apparently square feature, approximately 16m across the interior, possibly ditched and about 20-25m across overall. There are traces of a subdivision apparently aligned on the southern side of this feature.

J.Wiles, RCAHMW, 2 March 2004.