At Brantôme on the Dronne a good many of the houses are against the rock, the caves built up in front with the usual window and door to each. More have their workshops in grottoes, in them blacksmiths have their forges, carpenters their planing benches, tinkers, tailors, cobblers carry on their business in comparative obscurity. The superior stratum of rock is of so hard and tenacious a quality that it holds together with very few piers to support it. When a citizen wants to enlarge his premises, he merely digs deeper into the hill; he has no ground-rent to pay. Some caves open a hundred feet wide without a support.

[Illustration: GRIOTEAUX. A hamlet under overhanging rocks and with chambers excavated in the rock. Above is a cave used as a place of refuge, and notches that indicate where was a gallery reached by a rope or ladder.]

[Illustration: LA ROCHEBRUNE. The upper chamber with eight holes in the floor, six for stabbing at those who had invaded the lower chamber, and two providing the means of escape.]

Any one motoring or going by rail from Angoulême to Périgueux should halt half-way at La Roche Beaucourt, where the rock l'Argentine contains a nest of cave-dwellings, with silos in the floors and cupboards in the walls.

That the savage is not extinct in these out-of-the-way parts may be judged from this—that at Hautefaye near by, the peasants in 1870 laid hold of M. de Moneis, who objected to the prosecution of the war with the Prussians after Sedan, cruelly maltreated him, and threw him alive on a bonfire in which he expired among the flames.

The whole south-east angle of the Isle of Sicily is full of underground cities, of which that of the Val d'Ispica is the most famous. These excavations are vulgarly called Ddieri, but they are not in most cases tombs, but dwelling-places for the living, as is shown by the handmills for oil and corn that are found in them.

The Val d'Ispica is a narrow valley situated between Modica and Spaicaforno; and throughout its entire length of about eight miles, the rock walls are pierced on both sides with countless grottoes, all artificial, and showing the marks of tools on their walls. They are scooped in the calcareous rock. Some consist of as many as ten or twelve chambers in succession, and are seldom more than 20 feet deep by 6 feet high, and they are of the same breadth. At the bottom of the valley flows a little stream that supplied the inhabitants with water, and irrigates wild fig-trees and pink-flowered oleanders. On a higher level grow broad-leaved acanthi and wild artichokes, and thick festoons of cactus hang down from the top of the rock and shade the entrances to the grottoes. A portion of the rock wall on the right bank of the stream has fallen, and exposed to sight the internal arrangement of the dwellings. But previous to this, ascent could only have been made by ladders or by notches in the rock for the insertion of toes and fingers, as among the cliff-dwellers in Arizona. There are ranges of these habitations on several stages, and steps cut in the rock allowed communication between them; but above all is a ledge or gallery open to the sky and commanding a magnificent prospect. This could be reached only by a ladder, and probably formed the rendezvous of the women of the Troglodyte town in an evening to enjoy the cool air, and exercise their tongues. It may also have served as the last refuge of the inmates of the caverns, who, after escaping to it could withdraw the ladder.

One dwelling of three storeys, with flights of steps in good preservation, is called the Castle by the peasants. Parthey, a German traveller, who investigated these dwellings, reckoned their number to be over 1500. He saw nowhere any trace of ornament about them. Doors and windows were mere rough holes cut through the limestone. Rings hewn in the stone which are found in the chambers probably served some purpose of domestic economy. Fragments of Samian ware and carved marble have been found in them, but are probably later than the construction of these habitations. Some contain graves, and these also may be later, but actually we know from history nothing about them. Rock tombs may have been utilised as dwellings or abandoned dwellings as tombs. To the present day some of them are still occupied, mainly by shepherds and poor peasants. The range in the Crimea from Cape Kersonese to the Bay of Ratla is formed of layers of limestone alternating with clay and argilaceous schist, a disposition of the strata that tends greatly to accelerate the disintegration of the cliffs. The clay gradually washed out 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.