tiompan wrote:
You could draw an analogy with the Boyne passage graves which have a huge amount of carved surfaces but there are no open air outcrops or boulders with carvings to be found in the area .
That really does depend upon how you define 'in the area'. There are plenty within 20 miles of Newgrange, but there is none in the immediate area. I believe the figure for
Drumirril (32km away) is somewhere around 70 panels now.
There were even more until the mid 1980s when a whole load was dynamited to take advantage of government funded land clearance :-(