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 Cæsar. 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 Iosolodunum, 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. [Illustration: BRENT TOR] A late curate of Tavistock, whose function it was to take the service on Brent Tor, and who found it often desperate work to scramble to the summit in storm and sleet and rain, resolved on forming a roadway to the churchyard gate. But he experienced some difficulty in persuading men to go out from Tavistock to work at this churchway. However, he supplied himself with several bottles of whisky, and when he saw a sturdy labourer standing idle in the market-place he invited him into his lodgings and plied him with hot grog, till the man in a moist and smiling condition assented to the proposition that he should give a day to the Brent Tor path. By this means it was made. The curate was wont to say: "Hannibal cut his way through the Alps with vinegar; I hewed mine over Brent Tor with prime usquebaugh." Few traces of this way remain, but in making it sad mischief was made with the inner wall of the fortress. On Brent Tor summit it is sometimes impossible to stand against the wind. I remember how that on one occasion a baptismal party mounted it in driving rain. The father carried the child, and he wore for the occasion a new blue jersey. When the poor babe was presented at the font it was not only streaming with water, but its sopped white garments had become blue with the stain from the father's jersey. On an occasion of a funeral, when the parson emerged from the church door he was all but prostrated by the north-west blast, and he and the funeral party had to proceed to the grave much like frogs. "Crook'y down, sir!" was the sexton's advice; and the whole company had to press forward bent double, and to finish the service seated in the "lew" of headstones.