It was found by Rev. J.C. Roger in a cottage, who stated that the stone had been unearthed from a "moss" (i.e. a peat bog) in April 1876, having been originally discovered five feet (1.5 m) below the surface [REF].
The stone is made of slate and is 44in long, by about 13in in breadth and 1in thick with the inscription on the flat surface.