This is the same rock described by Hob on the S side of Fallowlees Burn showing the view E towards Fontburn Reservoir and the site of Fontburn (b) (Greenleighton Hill). Several rocks in this area of ancient enclosures have interesting markings but it is hard to tell that they are not natural. This rock lies further E of the location given by Hob, within the enclosure that meets the wall (the gate can just be seen to the right) at approximate grid reference NZ 027 936.
Image credit: Rockandy