Thanks Morfe. That's really interesting.
Do you reckon this photo from the Soukos Designs web site is the Kinnerton Court Stone II?
http://www.soukosdesigns.force9.co.uk/800x600/recreation/localhistory/images/kin-stone2.jpg
I've tried finding this stone twice now, with no luck. Have you seen it before? The description of the un-named stone on the page you posted is also useful.
Strangely there's no mention of the Hindwell Stone.
K x