This stone was thought to be lost and its location was only recently rediscovered by chance. It used to be in a field hedge some 3km from where it now resides in a yard. The stone features on Anthony Weir's website and has teased me for over 6 years. I've looked for it so often and I feared that it had been buried or covered by field clearance and would never be seen again.
This boulder is 1.2m long and 60cm wide. The carvings cover the whole of one surface and include a group of three large, deep cup-marks two of which are wrapped by a figure of eight ring, a line of deep cup-marks with rings and many other cup-marks. There is a group of six cup-marks that are arranged in two lines like the six side of a die. It's a beautiful, beautiful piece of carving.
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This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.
Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.
Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.
The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.
UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.
ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.