I have looked for this stone so many times I've lost count. Today I found out why I've never found it before - I was looking in the wrong place! I was (mis)following some directions from a book.
The earthfast bouder is a little over 1m high with a surface about 2m x 1.5m. There are just a handful of eroded cup-marks around the highest area of the stone's top.
The views are along the valley to the west up the valley and east towards Lough Dan, which is out hidden from site by the intervening slopes. The Inchavore River runs along the valley bottom to the north of the stone, but this too is hidden by the way that the fields between slope.
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.