I realise St Clement’s church in Roghadal falls outside the scope of this site, but I've just added three pics of a stone which can be found on the second floor of the tower there to the images for Rubha Charnain.
http://www.themodernantiquarian.com/site/8408
Given the proximity of the two sites, does anyone think there's any connection, or is it just coincidental? goffik?