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102 by the primeval race, the tombs of their dead, the stone row set up in memory of some chief represented by the Longstone towering above the petty stones below, the circle in which the dead were burned, and finally, the camp to which they flew to defend their beloved moor from invasion.

It may cause some surprise that the walls of the stone castles should be in such complete ruin. But, in all likelihood, they were constructed on the same principle as the Gaulish camps described by Caesar. They were built of timber frames packed in with stones, and the logs mortised together held the stones in place. When, however, the wood rotted, this mode of construction ensured and precipitated utter ruin. At Murcens, in the department of Lot, is one of these stone camps, and sufficiently well preserved, owing to the size of the limestone slabs employed in the building, to show precisely how the whole was constructed. But the walls of losolodunum, that held out so bravely against Cæsar, being built of small stones compacted with timber, are now but heaps of ruin, no better than those of Whit Tor.

Brent Tor was fortified in a manner very similar to Whit Tor; the outer wall remains fairly perfect on the north side, but the inner wall has been much injured. In this instance it is not the summit, but the base of the hill that has been defended. As there is a church on the summit, as also a churchyard with its wall, these have drawn their supplies from the circumvallation. Moreover, it has been broken through to form a way up to the church.