Saw the updated article this morning. Now I am struggling to work out the angles again - I really though I'd cracked it the other night too.

Which direction do YOU see the etching from ? I had assumed that it had to be within the horseshoe looking either East or West, with the actual direction dictated by the existing outer ring lintel-end.

Is there any approximate timeline for the disappearance of any of the stones after Inigo Jones' visit?