It is much more difficult to trace the origin of the avenues which are not attached to circles, and do not lead to any important monuments. Nothing that is buried at all resembles them in form, and no erections in the corresponding microlithic style, either in the Mediterranean countries or in India, afford any hints which would enable us to suggest their purpose. We are thus left to guess at their uses solely from the evidence which can be gathered from their own form and position, and from such traditions as may exist; and these, it seems, have not hitherto been deemed sufficient to establish even a plausible hypothesis capable of explaining their intention. Take, for instance, such an example as the parallel lines of stones near Merivale Bridge on Dartmoor. They certainly do not form a temple in any sense in which that word is understood by any other people or in any age with which we are acquainted. They are not procession paths, inasmuch as both ends are blocked up; and, though it is true the sides are all doors, we cannot conceive any procession moving along their narrow gangway, hardly three feet in width. The stones that compose the sides are only two and three feet high; so that, even if placed side by side, they would not form a barrier, and, being three to six feet apart, they are useless except to form an "alignment." There is no place for an image, no sanctuary or cell; nothing, in fact, that can be connected with any religious ceremonial. If the inhabitants of the place had really wanted a temple, in any sense in which we understand the term, there is a magnificent tor, a few hundred yards off to the northward, where Nature has disposed some magnificent granite blocks so as to form niches such as human hands could with difficulty imitate. All that was wanted was to move the smaller blocks, lying loose in front of it, a few yards to the right or left, and dispose them in a semicircle or rectangular form, and they would have one of the most splendid temples in England in which to worship the images which Cæsar tells us they possessed.[70] They, however, did nothing of the kind. They went to a bare piece of moorland, where there were no stones, and brought those we find there, and arranged them as shown on the plan; and for what purpose? [Illustration: 12. AVENUES, CIRCLES AND CROMLECH, NEAR MERIVALE BRIDGE, DARTMOOR. From a drawing by Sir Gardner Wilkinson.]