It has been conjectured that this strange construction was a granary, in which the peasants concealed their corn; but there are difficulties in accepting this theory. The Rochebrune commands the road, and a hiding place would assuredly be located in the depths of a wood, away from a highroad, in some secluded valley. It has been conjectured that the holes served for discharging the corn into the lower chamber. But why carry it by a narrow winding stair aloft to pour it down into a nether cave, when the latter, the supposed granary, itself was at once accessible through the doorway? Moreover, two of the holes open outwards, and not into the supposed store-chamber. It may be said that these were for hauling up the sacks of corn, but the incline on which they open is so steep, that it would be a prodigious waste of labour to drag the corn up under the cornice in which they are, whereas the other ascent is easy. The precautions taken to provide means of stabbing at an assailant point to this having been a fortress. My interpretation of the puzzle is this: first, that the left hand stair leading to the summit of the crag enabled one of the defenders to light a beacon, so as to warn the people of Brantôme when danger threatened; that next, the garrison, which could not have comprised more than five or six men, as Rochebrune is very small, retired within the rock. If this courtyard were invaded, they escaped into the lower chamber and barred the door, and were able to thrust at assailants through the slots. But if the door yielded they would scramble up the rock stair into the upper apartment, and as the enemy broke into the lower cavern, they stabbed and thrust at them through the six holes in the floor. Should their position be rendered untenable, they could slip through the two holes that opened outwards, into the brushwood and so effect their escape; for these holes would not be perceived, or their purpose understood by besiegers unfamiliar with the castle. Usually, over the floor, riddled like a colander, planks were laid, that on emergency could be turned up on their sides. I may add that the windows opening outwards are purposely so inartificially made that no one passing along the road underneath would suspect that there was a fortress above his head. He would certainly suppose that these holes were natural, such as are commonly found in the chalk cliffs. In fact the first time I visited Brantôme, and walked down the river to Bourdeilles, I passed this rock and entertained no suspicion that it contained anything remarkable, that it was as a matter of fact, a mere shell, with all the artificial work within.