I knew I was heading in the wrong direction when the railway track appeared on my left hand side, so I doubled back, failed to find the gate I'd come through and guessed which way to head. I knew I was getting close when I reached a big sign saying, "Beware of the bull in this field". A common ploy, easily transparent when there is no bull in sight.
The stone, a nice one, stands confined between two barbed wire fences in a field boundary. It is 1.8m tall, 60cm wide and 30cm thick. It has been shaped very nicely with a rounded top.
The tumulus marked on the OS map next to it is practically invisible beneath a mass of trees and bushes.
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.