Hey Bawn, some nice old photos in those links you posted.
The Newgrange ones quite took me aback. I've heard/read much talk of how it's present appearance owes lots to renovation, but I'd not realised it to what extent it used to look very different:
http://www.limerickcity.ie/Museum/image%5C1996%5C19961314121.jpg
This one of the Pillar stone is begging for a caption :)