Mr Tiompan, am I right in thinking that Fyfield is the only one on sarsen though? It's a bugger to carve is sarsen, even with modern metal tools. I've tried, and have found it quickly blunts everything from carbonised steel to Pike'O'Stickle andesite.

The Fyfield stone is mostly cups, though there is a weird 'slug' shaped thing (blame Goffik, it was he who branded it a slug) which seemed artificial, so it would be a good thing to look at as comparison. The things on Stonehenge are metal-tool jobbies, so would be a bit misleading for comparison with your bog-standard rock art, which would of course, be pecked out with stone picks (allegedly). Mind you, Fyfield looks ground out rather than pecked, so maybe that line of thought is a red herring.

Most interesting stuff Slumpy :)