Of such changes, not the greatest, but the most interesting to the question we have at present in hand, were those vicissitudes of climate which followed upon the time when the formation of the crust of the earth had been practically completed. We learn of a time when, instead of the temperate climate which now favours our country, these islands, with the whole of the north of Europe, were wrapped in one impenetrable sheet of ice. The tops of our mountains, as well as of those of Scandinavia and the north of continental Europe, bear marks of the scraping of this enormous glacier, which must have risen to a height of two or three thousand feet. Not a single green thing, therefore, might be seen between our latitudes and the pole, while the ice-sheet, passing along the floor of the North Sea, united these islands with Scandinavia and spread far out into the deep waters of the Atlantic. For thousands of years such a state of things endured, but at last it slowly passed away. As century followed century the glacier began to decrease in size. From being colder than that of any explored portion of our hemisphere, the climate of northern Europe began to amend, until at last a little land became visible, which was covered first with lichens, then with thicker moss, and then with grass; then shrubs began to grow, and they expanded into trees and the trees into forests, while still the ice-sheet went on decreasing, until now the glaciers remained only in the hills. Animals returned from warmer climates to visit our shores. The birds and beasts and fishes of the land and sea were not much different from those which now inhabit there; the species were different, but the genera were for the most part the same. Everything seemed to have been preparing for the coming of man, and it is about this time that we find the earliest traces of his presence upon earth.[2]
We may try and imagine what was the appearance of the world, and especially of Europe—for it is in Europe that most of these earliest traces of our race have as yet been found, though all tradition and likelihood point out man’s first home to have been in Asia—when we suppose that man first appeared upon these western shores. At this time the continent of Europe stood at a higher level than it does now. The whole of the North Sea, even between Scotland and Denmark, is not more than fifty fathoms, or three hundred feet deep, while the Irish Sea is not more than sixty fathoms; and at this period undoubtedly the British Isles, besides being all joined together, formed part of the mainland, not by being united to France only, but by the presence of dry land all the way from Scotland to Denmark, over all that area now called the German Ocean. Our Thames and our other eastern rivers were then but tributaries of one large stream, which bore through this continent, and up into the northern seas, their waters united with those of the Rhine, and perhaps of the Weser and the Elbe. The same upheaval turned into land a portion of the Atlantic Ocean, all that bed probably which now extends from Spain and Africa as far as the Azores and the Canaries. The north of Africa was joined on to this continent and to Spain, for the narrow Straits of Gibraltar had not yet been formed; but a great sea stood where we now have the Great Sahara, and united the Mediterranean and the Red Sea, while a great Mediterranean Sea stood in Central Asia, and has left no more than traces in the Caspian Sea and the Sea of Aral.
We have to look at a map to see the effect of these changes in the appearance of Europe; and there were no doubt other internal changes in the appearances of the countries themselves. The climate still was much more extreme than it is now. The glaciers were not yet quite gone. And the melting of these and of the winter snows gave rise to enormous rivers which flowed from every hill. Our little river the Ouse, for instance, which flows out through Norfolk into the Wash, was, when swollen by these means, probably many miles broad. Vast forests grew upon the banks of the rivers, and have left their traces in our peat formations; and in these forests roamed animals unknown to us. Of these the most notable was the mammoth (Elephas primigenius, in the language of the naturalists), a huge, maned elephant, whose skeleton and gigantic tusks are conspicuous in some of our museums, and who has given his name to this the earliest age of man’s existence: it is called the Mammoth Age of man. With the mammoth, too, lived other species of animals, which are either now extinct, or have since been driven from our latitudes; the woolly rhinoceros, the cave lion, the cave bear, the Lithuanian bison, the urus, the reindeer, and the musk-ox. It is with the remains of these animals, near the ancient banks of these great rivers, that we find the earliest tools and weapons manufactured by human hands.
Implements of
the river drift.
The earliest of all the known remains of human-kind are the implements which are found deposited in the ancient beds of rivers. Now flooded by melting snow into huge lakes and now again drained off by the sudden bursting of a bound, it was natural that these great streams should often change their course, and often dig out huge areas of soil from the land upon their banks. In doing so they sometimes dug out the implements which earlier generations of men had left behind them on the surface of the soil, and which a few years would be enough to cover with mould and hide from sight. Then carrying along these implements of flint, they have deposited them in great beds of sand and gravel, somewhere in their ancient course.
We have no means of measuring the time which may have elapsed since these stone weapons and tools were made. And we need not speak here of the geological changes which must have passed over the surface of the earth since they were deposited upon it. All we know is that, after the great streams flowing through wide valleys have dug these implements from under the earth which time had heaped over them, carried them along and deposited them once more amid sand and pebbles in a bed upon some point of its course, the river must through long subsequent years have cut so much deeper into the valley through which it flowed, and at the same time probably so shrunk in its bed, that these river drifts, as they are called, stand in many cases fifty, eighty, a hundred feet above the level of the present stream. It is because they are found in the beds made by the ancient rivers, that the implements of this period are called drift implements.
The river Ouse, of which we spoke just now, which, though to-day a small river, drains a large and level country as it runs through the counties of Bedford, Huntingdon, and Cambridge, has been one of the most prolific in this class of pre-historic remains. Another river which still better deserves to be remembered in this respect is the Somme in the north of France. For it was in the beds of this stream, by Abbeville and Amiens, that the drift implements were first discovered, or first recognized for what they really are, the earliest traces of human labour; and it was here that the foundation was laid for this branch of pre-historic study by M. Boucher de Perthes. This was forty-one years ago, in 1847.
These drift implements, then, form a class apart—apart even from all other stone implements made by man, and probably earlier than any other class. Very simple and rude are these drift implements. It would require a skilled eye to detect any difference between most of them and a flint which had only been chipped by natural means. But the first thing to remember is, that the makers of these implements had nothing but other still ruder materials to help them in this manufacture of theirs. Metals of all kinds were as yet utterly unknown to man.
We who are so habituated to the employment of metal, either in the manufacture or the composition of every article which meets our eye, can scarcely realize that man lived long ages on the earth before the metals and minerals, its hidden treasures, were revealed to him. This pen I write with is of metal, or, were it a quill, it would still have been shaped by the use of steel; the rags of which this paper is made up have been first cut by metal knives, then bleached by a mineral (chlorine), then torn on a metal cylinder, then thrown into a vat which was either itself of metal or had been shaped by metal tools, then drawn on a wire-cloth, etc. And so it is with everything which is made nowadays. We can scarcely think of any single manufacture in which is not traceable the paramount influence of man’s discoveries beneath the surface of the ground. But primitive man could profit by no such inherited knowledge, and had only begun to acquire some powers which he could transmit to his own descendants. For his tools he must look to the surface of the earth only; and the hardest substances he could find were stones. Not only during the period of which we are now speaking, but for hundreds, perhaps thousands, of years lasted man’s ignorance of the metals, ignorance therefore of all that the metals could produce for him. The long age of this state of ignorance is distinguished in pre-history by the name of the Stone Age, because the hardest things then known to mankind were stones, and the most important of his implements and utensils had therefore to be made of stones.
There can be no harm if we so far anticipate our second chapter as to say that this Stone Age is distinguished by pre-historic students into two main periods: (1) the age in which all the stone implements were made exclusively by chipping, (2) the age in which grinding or polishing was brought in to supplement the use of chipping. Wherefore the first age is also called the Unpolished Stone Age, the second is called the Polished Stone Age. Not that by any means all the implements in the later age were made of polished stone; far from it. Only that, contemporaneously with the stone implements still made by chipping merely, others of polished stone were used. But of this more hereafter. Lastly, the two epochs are also distinguished more simply as the Old Stone Age and the New Stone Age—or, turned into Greek, the Palæolithic Era and the Neolithic Era.