< does the full text of ‘Yorkshire Coiners’ offer any more clues? >
Positionally, no. He simply told: "The position of the circle is on the left hand side of the valley going up, a few yards above the damn of the second reservoir." Though in the Great Drought a few yars back, Fortean writer Andy Roberts told me he'd been for a wander up here and saw it just as Ling Roth shows it in his picture. I seem to recall either him or a mate getting a photo of the site in situ during the drought. I'm sure you'd be able to find him on-line somewhere, via Fortean Times or similar websites.