I can only echo the view of SDillmore and say that this was one of my least enjoyable walks. Admittedly it was a day of unrelenting rain, but I found the Bearnaghs to be wet, boggy and difficult underfoot. Access isn't easy either, and our approach from the south is not recommended.
With visibility down to 50m, groping around on the broad, featureless summit failed to produce anything in the way of a summit marker. Linkback: https://mountainviews.ie/summit/390/comment/1943/