Experts and volunteers working at Castilly Henge have been trying determine if it is the county’s lost great stone circle Experts and volunteers working at Castilly Henge have been trying determine if it is the county’s lost great stone circle It was a grey Cornish autumn day, but Henry Stevens’s tough shift digging in a field next to the A30 was about to get very exciting. Her eye was caught by something glinting in the soil and she picked up a flake of flint that had lain for thousands of