The circle of cists on Mule Hill, in the Isle of Man, are interesting from another cause; for unfortunately they all have been laid bare and rifled before any antiquary took cognisance of them, and we have consequently nothing by which their date can be even guessed at. Their interest lies in their arrangement, which is that of eight cists arranged in a circle, with, it would seem, others at right angles at certain intervals.[183] From simple inspection it is evident that these cists must at one time have been covered with earth. They are not dolmens, or anything that would do for self-standing monuments. If covered with earth, they would form a circular mound 45 feet in diameter internally, and 65 feet across to the foot of the outer slope, and, as far as one example can go, would tend to prove that the circular vallum at Avebury and many other places was a place for the deposit of bodies. Except in the instance spoken of in describing the circle at Marden, I am not aware of bodies having been found in England under these ramparts; but they have not been sought for. Of one thing we may feel certain, that nothing is unique in these matters, and that what occurred once, occurred frequently, and will no doubt be found when looked for. Another peculiarity of this circle is worth observing. There are two gaps or openings in the circle opposite one another, as at Arbor Low and Penrith. One must not rely too much on this, as the gaps here may arise from the removal of cists; but the coincidence is at least curious, and if we restored this monument in the sense just indicated, and could rely on that restoration, the secret of the vallum surrounding Avebury and other similar monuments would no longer be a mystery. To my mind it has not been so for many years past; but though I dare not yet ask others to follow at once, I trust sufficient evidence has been accumulated in the preceding pages to render it probable that they were only continuous tumuli. The circle or rather circles, on Burn Moor, near Wast Water, Cumberland, are described by Mr. Williams as consisting of a 100-foot circle, formed of forty-four stones, beyond which, at a distance of 25 feet is an outer circle of fourteen large stones. A niche or square enclosure on one side of the inner circle contains a cairn 25 feet in diameter, and within the circle are four others, irregularly spaced, and measuring 21 to 25 feet in diameter; each like the circle itself, surrounded by fourteen stones. These, on being opened, were found to contain a rude chamber formed of five stones, in which were found remains of burnt bones, horns of stags, and other animals.[184]