In the style of J. Collingwood Bruce’s “Incised Markings on Stone Found in the County of Northumberland, Argyllshire and Other Places’‘
see also:rockartuk.fotopic.net/c1184529.html
(They hadn’t found Ketley Crag’s carvings back in 1869, but if they had, I’ll bet they would have had a double spread in the book)
Image credit: IH
I'm sure JCB would approve.