1. One of three cairns upon a summit of Plynlimon, (see Nprn275659, 309800), c.10m in diameter & 1.0m high, having several shelters & an OS trig. pillar set upon it.
(source Os495card; SN78NE9)
RCAHMW AP955040/44-5
J.Wiles 16.01.04