Page:Cliff Castles and Cave Dwellings of Europe.djvu/63

 by springs or eaten away by the weather forms great caverns in the sides, and these are liable to fall in when deprived of support. They have, however, been utilised as habitations. The Rock of Inkermann, the ancient Celamita, runs east of the town beyond the marshy valley of the Chernaya; it has been converted into a vast quarry which menaces with destruction the old Troglodyte town that occupied the cliffs. The galleries of this underground town form a rabbit warren in which it is dangerous to penetrate without a guide or a clue. Some of the chambers are large enough to contain five hundred people.

The rocks of Djonfont-kaleharri are also honeycombed, with still inhabited caves; some are completely cavernous, but others have the openings walled up so as to form a screen. Beneath an overhanging rock is a domed church used by this Troglodyte community.

If we cross the Mediterranean to Egypt, we see there whole villages of cave-dwellers. The district between Mansa-Sura and Cyrene is full of grottoes in the very heart of the mountains, into which whole families get by means of ropes, and many are born, live and die in these dens, without ever going out of them.

The volcanic breccia as well as chalk and limestone has been utilised for the habitation of man. There is a very interesting collection of cave-dwellings all artificial, the Balmes du Montbrun, a volcanic crater of the Coiron, near S. Jean le Centenier in the Vivarais. The crater is 300 feet in diameter and 480 feet deep; and man has burrowed into the sides of porous lava or pumice to form a series of habitations, a chapel, and one that is traditionally said to have served as a prison. This rock settlement was occupied till the close of the eighteenth century.

The Grottoes de Boissière are twelve in number, on the side of the Puy de Châteauneuf, commanding the road from Saint Nectaire to Marols, Puy de Dome. They are