.. a Druidical circle called the Nine Stones, 28 ft. in diameter. It stands on a bare spot, which, in the belief of the country people, is likely to continue in the same condition, as there is a popular notion that trees will not grow within the circle.
The stones are of a cherty conglomerate, and 8 in number, and one only appears to be wanting.
p118 in ‘Handbook for travellers in Wiltshire, Dorsetshire and Somersetshire’ by John Murray (1859) – on Google Books.