'St. Patrick's Knee' : Bullaun Stone

TownlandClonaltra West
Grid RefN 144 341
GPSN 14388 34100 (5m)
Longitude7° 47' 1.99" W
Latitude53° 21' 24.94" N
ITM east480366
ITM north584435
Nearest TownMoate (6.2 Km)
OS Sheet48
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 22nd June 2008

I was given directions to the stone from a nearby house and it was here that I was told that it is known local as St. Patrick's Knee, a common enough name for a bullaun stone. The directions were close enough for me to spot where the stone is now hidden and locate it: near to a stream in a copse of trees

The stone itself is an odd one. The upper surface is encrusted with quartz pebbles. I've never seen a boulder like this used for a bullaun before.

There are two basins in a line along the long axis of the boulder, both of which are elongated and are probably enhanced natural hollows. The boulder is 1m long, 50cm tall and 40cm deep.

A broken cross slab stands next to one end of the stone that has the lower half of a very worn cross carved on it in relief.

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About Coordinates Displayed

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.

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