Found this for you:

"Colonel Forbes Leslie and Dr. Borlase give an engraving of some circles at Botallack, interlacing one another in a most remarkable and inexplicable manner, and my next escursion was in search of these. I am not prepared to say positively that they did not exist when Dr. Borlase wrote, a century ago, or that they do not exist now,* but, although I made careful enquiries, the only thing I could find in the neighbourhood was a circle called the "Nine Maidens"..

*W.C. Borlase, Esq, F.S.A., a descendant of Dr. Borlase, tells me that they stood in front of Botallack Manor House, but do not now exist."

this is from p iii of
A Description of Some Archaic Structures in Cornwall and Devon.
A. L. Lewis
The Journal of the Anthropological Institute of Great Britain and Ireland, Vol. 1. (1872), pp. i-ix.

Whether you believe any of it is up to you of course, Hob? I don't think Mr Lewis believed it particularly?