Another view of the cut section of the capstone. Image credit: A. Brookes/Bloss (20.6.2011) thesweetcheat Aug 25, 2011
You've caught that really well SC. I'm still wondering about that. Although it is more likely to be recent it still begs the question, why?
It does indeed. Very strange - well-spotted you, I might add (I don't think I would have even noticed it).