Standing stones supposed to be of Druidical or memorial origin are seen in Glamorgan near Cottrell, the seat of Mrs. Macintosh, wife of the Macintosh of Macintosh. The story about these stones is that some women had sworn falsely against an innocent man, who was put to death on the gallows on Bryn Owen Mountain, subsequently known as the Stallingdown. These women were turned into stones on their way home.
(the other stone is possibly the one at Redland Park). From Marie Trevelyan’s “Folk-lore and folk-stories of Wales”, published in 1909 and online at V Wales:
red4.co.uk/Folklore/trevelyan.htm