From 'WRAO' on Facebook:
"Six? possible cup-marks on a stone re-used as a gate post. The hole in the centre is for a gate bolt and is distinctly different in character to the standard bowl profile of the cup-marks... continues...
First Tara.. and now the welsh assembley has followed suit by sneaking through the distruction of one of the most sacred sites on anglesey.
2km from Holyhead is Ty Mawr and Trefignath and surrounding tombs and circles.
Excavators are currently ploughing up the area so as to build a buisness park on the site... continues...
"The island of Anglesey has a personality all of its own. Sheltered in the lee of Snowdonia, it is the only area of fertile and accessible land in a region of high and barren mountains. It is, therefore, not surprising that settlers have been drawn to its shores from the dawn of history. And they have left us some of the most inspiring monuments in Wales."
At the late Flint Assizes a man was indicted for extorting 14s. 6d. from another person under the pretence of rescuing him from "the well," Llaneilion.
It appears that a profitable species of incantation has long been practised by the wizards and witches in the neighbourhood of this celebrated well. It is customary, even at the present day for people at enmity with each other to write the names of those they wish to denounce on a piece of slate or paper, which they throw into the mysterious well; and it is implicitly believed, that so long as the name remains therein, the person is at the mercy of the evil genii, and consigned to ultimate perdition.
To escape from this worse than papal malediction, sums of money are given to have the name removed, and thus restore the party to peace. This indictment, it is hoped, will have the effect of finally destroying this ridiculous and superstitious custom. About twelve years ago, a poor tailor in Flintshire was charged with stealing a goose from an old woman; she was asked how she came to suspect the offender; when she observed that having threatened to "throw his name into the well," he confessed the crime!
From the Royal Cornwall Gazette, Falmouth Packet and Plymouth Journal, September 9th, 1818. Kind of reminds me of the lead curses thrown into the pool at Aquae Sulis nearly 2000 years before.