In a vastly remote past, and for a vastly extended period, the mighty deep rolled over the surface of a world inform and void, depositing a sediment of its used up living tenants, the microscopic cases of foraminiferæ, sponges, sea-urchins, husks, and the cast limbs of crustaceans. The descending shells of the diatoms like a subaqueous snow gradually buried the larger dejections. This went on till the sediment had attained a thickness of over one thousand feet. Then the earth beneath, heaved and tossed in sleep, cast off its white featherbed, projected it on high to become the chalk formation that occupies so distinct and extended a position in the geological structure of the globe. The chalk may be traced from the North of Ireland to the Crimea, a distance of about 11,140 geographical miles, and, in an opposite direction, from the South of Sweden to Bordeaux, a distance of 840 geographical miles.
It extends as a broad belt across France, like the sash of a Republican mayor. You may travel from Calais to Vendôme, to Tours, Poitiers, Angoulême, to the Gironde, and you are on chalk the whole way. It stretches through Central Europe, and is seen in North Africa. From the Crimea it reaches into Syria, and may be traced as far as the shores of the sea of Aral in Central Asia.
The chalk is not throughout alike in texture; hard beds alternate with others that are soft—beds with flints like plum-cake, and beds without, like white Spanish bread.
We are accustomed in England to chalk in rolling downs, except where bitten into by the sea, but elsewhere it is riven, and presents cliffs, and these cliffs are not at all like that of Shakespeare at Dover, but overhang, where hard beds alternate with others that are friable. These latter are corroded by the weather, and leave the more compact projecting like the roofs of penthouses. They are furrowed horizontally, licked smooth by the wind and rain. Not only so, but the chalk cliffs are riddled with caves, that are ancient water-courses. The rain falling on the surface is drunk by the thirsty soil, and it sinks till, finding where the chalk is tender, it forms a channel and flows as a subterranean rill, spouts forth on the face of the crags, till sinking still lower, it finds an exit at the bottom of the cliff, when it leaves its ancient conduit high and dry.
But before the chalk was tossed aloft there had been an earlier upheaval from the depths of the ocean, that of the Jurassic limestone. This was built up by coral insects working indefatigably through long ages, piling up their structures, as the sea-bottom slowly sank, straining ever higher, till at length their building was crushed together and projected on high, to form elevated plateaux, as the Causses of Quercy, and Alpine ranges, as the Dolomites of Brixen. But in the uplifting of this deposit, as it was inelastic, the strain split it in every direction, and down the rifts thus formed danced the torrents from higher granitic and schistous ranges, forming the gorges of the Tarn, the Ardêche, the Herault, the Gaves, and the Timée, in France.
It has been a puzzle to decide which appeared first, the egg out of which the fowl was hatched, or the hen which laid the egg; and it is an equal puzzle to the anthropologist to say whether man was first brought into existence as a babe or in maturity. In both cases he would be helpless. The babe would need its mother, and the man be paralysed into incapacity through lack of experience. But without stopping to debate this question, we may conclude that naked, shivering and homeless humanity would have to be pupil to the beasts to learn where to shelter his head. Where did man first appear? Where was the Garden of Eden? Indisputably on the chalk. There he found all his first demands supplied. The walls of cretaceous rock furnished him with shelter under its ledges of overhanging beds, flints out of which to fashion his tools, and nodules of pyrites wherewith to kindle a fire. Providence through aeons had built up the chalk to be man's first home.
Incontestably, the great centres of population in the primeval ages were the chalklands, and next to them those of limestone. The chalk first, for it furnished man with flints, and the limestone next when he had learned to barter.
He could have lived nowhere else, till, after the lapse of ages, he had developed invention and adaptability. Besant and Rice, in "Ready-money Mortiboy," speak of Divine Discontent as the motive power impelling man to progress. Not till the chalk and the limestone shelters were stocked, and could hold no more, would men be driven to invent for themselves other dwellings. The first men being sent into the world without a natural coat of fur or feathers, would settle into caves or under overhanging roofs of rock, and with flint picked out of it, chipped and pointed, secure the flesh of the beast for food and its hide for clothing. Having accomplished this, man would sit down complacently for long ages. Indeed, there are certain branches of the human family that have progressed no further and display no ambition to advance.
Only when the districts of chalk and limestone were overstocked would the overflow be constrained to look elsewhere for shelter. Then some daring innovators, driven from the favoured land, would construct habitations by grubbing into the soil, and covering them with a roof of turf. The ancient Germans, according to Tacitus, lived in underground cabins, heaped over with dung to keep them warm during the long winter. With the invention of the earthenware stove, the German Bauer has been enabled to rise above the surface; but he cherishes the manure round his house, so to speak, about his feet, as affectionately as when it warmed his head.
For a long time it was supposed that our British ancestors lived in pit dwellings, and whole clusters of them were recorded and mapped on the Yorkshire Wolds, and a British metropolis of them, Caer Penselcoit, was reported in Somersetshire. Habitations sunk deep in the rock, with only a roof above ground. But the spade has cracked these archæological theories like filberts, and has proved that the pits in the wolds were sunk after iron ore, or those in Somerset were burrowings for the extraction of chert. [Footnote: Atkinson, "Forty Years in a Moorland Parish." Lond. 1891, p. 161, et seq. Some pits are, however, not so dubious. At Hurstbourne, in Hants, pit habitations have been explored; others, in Kent and Oxfordshire, undoubtedly once dwelt in. In one of the Kentish pits 900 flakes and cores of flint were found. The Chysoyster huts in Cornwall and the "Picts houses" in Scotland were built up of stones, underground.] But the original paleolithic man did not get beyond the cavern or the rock-shelter. This latter was a retreat beneath an overhanging stratum of hard rock, screened against the weather by a curtain of skins. And why should he wish to change so long as these were available? We, from our advanced position, sitting in padded arm-chairs, before a coal fire, can see that there was room for improvement; but he could not. The rock-dwelling was commodious, dry, warm in winter and cool in summer, and it cost him no trouble to fashion it, or keep it in repair. He had not the prophetic eye to look forward to the arm-chair and the coal fire. Indeed, at all periods, down to the present day, those who desire to lead the simple life, and those who have been reared in these nature-formed dwelling-places, feel no ambition to occupy stone-built houses. In North Devon the cottages are reared of cob, kneaded clay, and thatched. A squire on his estate pulled down those he possessed and built in their place brick houses with slated roofs. The cottagers bitterly resented the change, their old mud-hovels were so much warmer. And in like manner the primeval man would not exchange his abris for a structural dwelling unless constrained so to do.