Help. At the summit of Kilmissan/Rathgeran hill (S788478), south-east of the rock art marked on OS sheet 68, is this stone.
http://www.themodernantiquarian.com/site/8529
I'm starting a sub-site for it and calling it a rocking stone for want of a better category. It could be some sort of altar stone from a less ancient time and if so I'll delete it, if I can have some feedback.
It's about 2 and a half metres in length, a metre or so wide and has a very pronounced lip all around it. It has a basin/bowl-like indentation towards its higher end. It's amongst many other interesting stones (a term I've started to use quite frequently), 150 metres from the beautiful carved stone on the north-west side of the hill.
thanks
Andy