I am glad for the reports in here and the directions otherwise it would not have been clear to me how to get to mauherslieve on an 'approved' route. I started off at point A - from the post above R89506121 A starA; through the gate and on what looked to me to be a farm road past a farmhouse and some sheds out the back there is a pathway that leads a trail through the woods; through a gate then through a rushy field, into a route/section of open ground between two blocks of forest (don't know the technical name). The grass was long underfoot and the terrain a bit uneven, after a while it was wet and boggy before getting to the last section which was just boggy. Rain Boots a must for a january visit, a couple of places where there is old barbed wire fencing along the side of the walkway, some of that is hidden by the long grass, so pay attention perhaps.
I did pick an overcast day for the hike, did not see anyone at all from start to finish. I am glad I did it, I was curious to visit the carin, Sometimes, maybe most times I am glad these places are not easy and attractive to get to as it prevents them being overrun with people so you can have a quiet moment someplace that is mythologically and culturally significant, which is becoming more and more rare these days. Linkback: https://mountainviews.ie/summit/368/comment/23837/