Hi Postman,
Nice pics of a lovely looking stone. In your misc. note you say that, according to the RCAHMS record, there is a 2nd stone.
Might the 2nd one be the stone that's between the telegraph pole and the main stone here
http://www.themodernantiquarian.com/post/62941/images/buldoo.html
and to the left of the telegraph pole here
http://www.themodernantiquarian.com/post/62940/images/buldoo.html
Maybe you noticed this already and I'm being a goof.
Andy