chapter 10._

"Stonehenge … may, I think, be regarded as a monument of the Bronze Age, though apparently it was not all erected at one time, the inner circle of small, unwrought, blue stones being probably older than the rest; as regards Abury, since the stones are all in their natural condition, while those of Stonehenge are roughly hewn, it seems reasonable to conclude that Abury is the older of the two, and belongs either to the close of the Stone Age, or to the commencement of that of Bronze. Both Abury and Stonehenge were, I believe, used as temples. Many of the stone circles, however, have been proved to be burial places. In fact, a complete burial place may be described as a dolmen, covered by a tumulus, and surrounded by a stone circle. Often, however, we have only the tumulus, sometimes only the dolmen, and sometimes again only the stone circle. The celebrated monument of Carnac, in Brittany, consists of eleven rows of unhewn stones, which differ greatly both in size and height, the largest being 22 feet above ground, while some are quite small. It appears that the avenues originally extended for several miles, but at present they are very imperfect, the stones having been cleared away in places for agricultural improvements. At present, therefore, there are several detached portions, which, however, have the same general direction, and appear to have been connected together. … Most of the great tumuli in Brittany probably belong to the Stone Age, and I am therefore disposed to regard Carnac as having been erected during the same period."

_Sir J. Lubbock, Prehistoric Times,