How do we not know that all these ring marks are not signs to lead the limpets to the great ONE...the chief Limpet! That stone circles are actually the places where the chief Limpet visited in the distant past and worshipers erected stones where he sat. Is Silbury not Limpet shaped?
Or...and think about this very carefully.....Is Silbury not the resting place of the Great Chief Limpet! What do you get if you scrape away the grass? a calcinous inner layer....is it shell?...why do you think there is often water around the base.
You may titter now, but come the great awakening...i'm with the limpets!
Mr H