You can never have to many books.
A few years ago, I saw a NG special on this area (described in this article) and one archaeologist said that it would have taken a population of 50 million to do all that work.
Hello Blam. I am an old Archaeology student and would love to be on your Archaeology-Ancitne History ping list, if you have one. Take care and I look forward to your future posts.