Pardon my ignorance but how many stones are actually under the ground waiting to be dug up?
I'm afraid I'll have to share your ignorance on that point Rhiannon, though I think it's true to say that new discoveries, in the north-east quadrant and in the Beckhampton Avenue for example, are frequently being made. Perhaps one of our archaeology contributors familiar with Avebury could help out here. Meanwhile this http://www.avebury-web.co.uk/bhengemap2a.png on Lithop's excellent Avebury website here http://www.avebury-web.co.uk/index.html may be of interest 
