C.P.R.E. (pron. coopry) Mobilise the Ottles ...

I didn't realise the Devil's Arrows were in Harrogate. The 'knare' bit of the placename, in Knaresborough, is probably Norse. The 'Knarr' was one of their boat designs. There's another R. Nar in Cambridgeshire - it has the highly endangered Compressed river mussel. The Arrows seem similar to some Breton menhirs. They are already decorated - by those deep runnels - but there may be fainter patterns still unrecognised, as at ( http://antiquity.ac.uk/ProjGall/Pre2003/Scarre/scarre.html ).