At Banwan Bryddin, a few miles from Neath, a stone pillar inscribed 'MARCI CARITINI FILII BERICII,' long stood on a tumulus which by the peasants was considered a fairy ring. The late Lady Mackworth caused this stone to be removed to a grotto she was constructing on her grounds, and which she was ornamenting with all the curious stones she could collect. An old man who was an under-gardener on her estate, and who abounded with tales of goblins, declaring he had often had intercourse with these strange people, told the Rev. Mr. Williams of Tir-y-Cwm, that he had always known this act of sacrilege would not go unpunished by the guardians of the stone. He had more than once seen these sprites dancing of an evening in the rings of Banwan Bryddin, where the 'wonder stone' stood, but never since the day the stone was removed had any mortal seen them. Upon the stone, he said, were written mysterious words in the fairy language, which no one had ever been able to comprehend, not even Lady Mackworth herself. When her ladyship removed the stone to Gnoll Gardens the fairies were very much annoyed; and the grotto, which cost Lady Mackworth thousands of pounds to build, was no sooner finished than one night, Duw'n catwo ni! there was such thunder and lightning as never was heard or seen in Glamorganshire before; and next morning the grotto was gone! The hill had fallen over it and hidden it for ever. 'Iss indeed,' said the old man, 'and woe will fall on the Cymro or the Saeson that will dare to clear the earth away. I myself, and others who was there, was hear the fairies laughing loud that night, after the storm has cleared away.'
The Sagranus Stone at St. Dogmell's, Pembrokeshire, was formerly used as a bridge over a brook not far from where it at present stands--luckily with its inscribed face downwards, so that the sculpture remained unharmed while generations were tramping over it. During its use as a bridge it bore the reputation of being haunted by a white lady, who was constantly seen gliding over it at the witching hour of midnight. No man or woman could be induced to touch the strange stone after dark, and its supernatural reputation no doubt helped materially in its preservation unharmed till the present time. It is considered on paleographic grounds to be of the fourth century.