On the NE side of a ridge projecting from the W side of Mynydd-y-glog are three piles of stone. They are stony mounds consolidated with light vegetation. They probably result from an episode of land improvement.

SN 96110856: 8m (E-W) by 5m and 0.3m high.
SN 96090858: 3m in diameter and 0.2m high.
SN 96120859: 6m (E-W) by 3m and 0.3m high.

David Leighton, RCAHMW, 7 August 2008