> Is it the one in the photo on the cover of this book:

Well that looks very much like Carreg Samson with a radar dish crafted onto the background.

Compare the photo here...

http://www.bbc.co.uk/cymru/adloniant/llyfrau/images/140-donald-evans.gif

...to the photo here...

http://www.themodernantiquarian.com/post/17907

It's tricky to see because the BBC image is so small, but look at the orthostats.

K x