Yeah, that's the one. He theorises that the stones were chosen because they are shaped like faces, or are carved into the shapes.

Looks like quite an interesting book, although I don't hold with the "faces" idea, personally. However, there is one of the stones that bears a striking resemblance to Kenneth Williams! So who knows? ;)

I sort of got the impression, though, that rather than this being a stone carved in the shape of a heart, that Tobydog found a marking on a stone in the shape of a heart... It could well be the remains of some lichen, graffiti, carving, natural erosion or just a shape in the stone.

It'd be good to see a photo so we can see what yer on about, Tobydog! :)

G x