Yep thats the ravendale one. Shame its modern, but it is an absolutely gorgeous spot for it. Perhaps a little too gorgeous!

We went up to the top of Black Mountain as it was easily reachable and en route to Clontygara from Carlingford. Fortunately we had a much nicer day than you. Pics to follow.
Were the carved stones from the big cairn?

Also the OS 50k map marks "Clermont Cairn" and "Megalithic Tomb" seperately. We found the big cairn and what looks like a Cist with the top off about 15m to the SE.