This find, a scattering of roof slates and odd pieces of thickly cut slate, is reported to be located at the north eastern point of the island and indicates the presence of a shipwreck. One of the slates measures 20in x 10in and is grey with green streaks. One of the odd pieces of slate has circular saw marks along its edge, several drilled holes and is inscribed '25S'.

Sources Include:
Holden, C, 2008, The Essential Underwater Guide to North Wales Vol 2, pg165

Maritime Officer, RCAHMW, February 2011.