Sometimes these places communicate with a river or a lake, as at Chillon, and this passage is set with irons, presumably to cut in pieces the body of the man cast down it. In the vast majority of cases these so-called _oubliettes_ are nothing but openings connected with the drainage of the castle or else are the well-mouths of cisterns in which the rain-water from the roofs was collected and stored. Nevertheless, the fact that skeletons have been found in some of the closed subterranean vaults, and that a percentage of them cannot be explained as having been anything else but receptacles for prisoners thrown in, to die a languishing death, and lastly, the historic certainty that some poor wretches have so perished, shows that popular belief is not wholly unfounded. The writer has himself been let down by ropes into one in which four skeletons were entombed, and it is well known that in 1403 one of the Counts of Armagnac so disposed of his cousin, who lingered on thus immured for eight days. The son would have shared his father's fate but that out of horror at the notion of being flung down the well on the corpse of his father, the poor lad dropped dead on the brink. Moreover, under the title of _vade in pace_, the _oubliette_ was used, not in castles only, but in convents as well, and was there introduced by Matthew, Prior of St. Martin des Prés, in Languedoc, in the middle of the fourteenth century, when the Archbishop of Toulouse interfered to forbid the employment of this inhuman mode of execution. A prelate might step in to check the barbarity of a prior, but who was there to hold the hand of a noble? Noémi saw a cluster of men outside the door that led into the dungeon, and forced her way through them. The dungeon was not large, it would not admit more than a dozen men. It opened on to a platform of rock on the outside of the castle, not into the inner court. Access to it was obtained by a doorway in the basement of the keep, where the wall was ten feet thick. The chamber was vaulted, and only near the middle sufficiently lofty to admit of anyone standing upright in it. There was no window by which light and air could penetrate. When the door was shut, both were excluded. The walls, the floor, the vault were of square-cut limestone. At the further end, immediately opposite the door was a recess, conchoidal, and in this recess what seemed to be a well. There was a stone step in the floor, and above that a circular coped wall, precisely such as may be seen where there is a well; with this difference, that the orifice was not two feet in diameter, a very inconvenient size for a bucket to pass up or down.