Disgrifiad1114m E of Byllfa-Uchaf, on S facing slope above Ysgir Fawr. Enclosure; Rectilinear; Incomplete. 94.7m x 57.0m. Comprises 2 parallel N/S banks, with faint E/W cross-bank closing N end. Overlain by later diagonal boundary. Early enclosure/field predating existing pattern.
