I'd looked for this stone on a previous visit to the area and not found it. This is hardly surprising when you see the size of the stone. It is lying in the grass just inside the gate to the church to the right of the path and measures just 50cm in any direction. There is a single bullaun (20cm diam x 10cm deep).
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From Tullow take the N81 for about 5.5km until you reach a cross roads and turn left. Turn left at the next cross roads and dirve to the church. The bullaun is 5m or so inside the gate to the right of the path leading to the church.
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.