The cropmark of a ridgetop subrectangular ditched enclosure north of Penwernallt, measures c.36m E-W by 26m, and shows traces of a circular structure, c.10m in diameter within, having a west facing entrance, without which are traces of a c. 180m trackway/linear feature.

RCAHMW AP965088/55; 965113/52-3
J.Wiles 03.11.03