nigelswift - connessoir and fine art scout: I'm pleased to report that you were RIGHT in your assessment. The painting has just been reserved by a purchaser!
:-)
J
X
(Would they mind if you made some prints of it? I don't see why they shouldn't be pleased, actually).
Judging by the way you do the pebbles I reckon you'd make a great job of a single single sarsen, maybe one of the big ones at Avebury. Have you tried anything like that?