Cheers for the good thoughts peeps, glad you likd them :)
You're right Rhiannon, he was a very creative fella wasn't he. Were I lucky enough to own a tricorn, I'd take it off to him.
Whilst reading the book, I couldn't help but wonder if he also made sketches of the other sites he mentions, ones which aren't shown in the book. Castlerigg and Long Meg are the two obvious ones, but he also mentions visiting the Clifton Stones, and the Mare and Foal, both of which sound as if they were more or less the same then as they are now.
But if he made images of Shap, they would be something well worth tracking down, as his description is of a much more complete set of stones.
There was also a clava type cairn in Kintyre, but the photo turned out too blurry.