http://www.themodernantiquarian.com/post/58396/news/orkney.html
What do you know about these earthhouses then, Wideford? They sound really intriguing. Souterrainish but under people's houses? Somewhere to have the ancestors (or whatever) close at hand? And used from the Neolithic right until Iron Age times?
Very interesting stuff. http://www.orkneyjar.com/history/earth-houses/index.html
Personally I think it was a childhood viewing of a Watch programme? about Skara Brae that got me interested in all this stuff. It's nice to think about what people did when they were alive instead of endlessly looking at burial mounds.