I've had a quick look through the books for references to any markings on the stones.
John Waterhouse in The Stone Circles of Cumbria.
Stone 7...has five smaller stones around it. These have the appearance of having been dumped there, presumably from the surrounding field, and it is possible that one of them is the vanished outlier.
Tom Clare in Prehistoric Monuments of the Lake District
Around a number of the stones in the circle are others, apparently the product of ploughing.
Burl in A Guide to the Stone Circles of Britain Ireland and Brittany
The site was known as Elfhow in 1488. This may be a corruption of elfshot, an old term for a prehistoric axe. As the circle does lie near a trackway along which such axes may have been transported westwards from the Langdales, this is a possibility. Equally 'elfhow' may be from 'elfhaugr', the hill of the elves, an old norse or viking name for Elva Hill.

cheers
fitz