Cefn-y-Gaer is an irregular enclosure, c.279m by 190m, defined by a single rampart and ditch, except on the north, where it is bivallate; there are indications of an annex, c.44m by 45m, to the north-east.

(source Os495card; SO16NW1)

RCAHMW AP955052/48-9

J.Wiles 27.08.02