http://books.google.co.uk/books?id=ifjw5Ce_NgEC&dq=The+Pagan+Religions+of+the+Ancient+British+Isles&pg=PP1&ots=roIAZ7lT4J&sig=YpinTbI6b-WZS1sFILJYVAFUxhE&hl=en&sa=X&oi=book_result&resnum=1&ct=result#PPR9,M1