Ancient Britain and the Invasions of Julius Caesar. T. Rice Holmes
Читать онлайн книгу.
and peculiar shapes; the chips have in many cases been removed not from the exposed parts but from concave sides which, he would have us believe, natural agents could hardly have affected;69 if Sir John Evans and other experts are unable to accept them as artificial, Canon Greenwell,70 Pitt-Rivers,71 and Prestwich72 were convinced that they had been wrought by man; even the labourers who picked them out of the gravel hardly ever failed to distinguish them from the surrounding flints;73 and, if we may believe the champions of their authenticity, those who assert that they were shaped by nature have failed to produce stones of similar forms from the valley-drift.74 Now when the hunters of the Thames valley were making their tools, Britain had the same main features of hill and dale that it has to-day; but when the gravels were being drifted on to the Kentish plateau, Thames and Medway were yet unborn; and, filling the great valley that now lies between the North Downs and the Lower Greensand hills, some five miles further south, the plateau rose southward to Central Wealden uplands two thousand feet or more above the sea. With no special knowledge of geology the antiquary who spends a holiday in walking from Sevenoaks or Wrotham on to the plateau may satisfy himself that this is true. Mingled with the eoliths in the patches of drift are fragments of chert that must have been washed down from the Lower Greensand at a time when it rose high above the plateau’s level; for south of the eolithic area, inclining upward below the chalk and below the Upper Greensand, the outcrop of the Lower Greensand shows itself still. The plateau drift lies upon rock of preglacial age;75 and although there is no evidence that it is itself older than the Pleistocene period, some geologists hold that it was deposited soon after, perhaps before, British glaciers began to form.76
But assuming that the eoliths are artificial, does it follow that they are older than the oldest palaeoliths, or that they were wrought by a race different from the men of the valleys? Mr. Clement Reid has pointed out that the gravel at Alderbury, some three miles below Salisbury, in which multitudes of eoliths have been found, is on exactly the same level as that of a gravel three miles lower down the valley, where Prestwich picked up a palaeolithic implement which had fallen from a yet higher elevation.77 If the position of this implement was an index of its age, eoliths were being used in Wiltshire after palaeoliths had begun to be manufactured.78 On the other hand, it is asserted that eoliths have lately been found in Tertiary deposits on the high plateau above the Avon;79 and one geologist, who rejects all eoliths, would argue that Benjamin Harrison’s labours have not been vain. Many palaeolithic implements have been found on the Kentish plateau, but never embedded in association with eoliths: most of them are unworn, and look as if they had remained on the very spot where they were lost; and it is easy to see that they are far less ancient than the eoliths. But certain implements have also been found there which, although they were not lying in the gravels, appeared to bear marks of having been derived from them and washed down in the same drift that contains the eoliths. Like the latter they were stained deep brown, covered with glacial scratches, and coated with the white deposit of silica.80 If this argument had been generally accepted, one might conclude that the greater antiquity of British man does not depend for its proof upon the authenticity of the eoliths. What all admit is that in France flints of eolithic form have been found even in Tertiary beds.81
But while the extreme antiquity of many eoliths is certain, the question of their authenticity has recently been debated with renewed and redoubled vigour. About two years ago an eminent French palaeontologist, Monsieur Marcellin Boule, announced that in the process of manufacturing cement at Mantes many flints had been converted into eolithic forms;82 and it has been contended that the conditions which were actually observed in the factory were analogous to those of the torrential streams by which flints may have been dashed hither and thither as they were swept on to the Kentish plateau in primaeval times.83 An ardent advocate of the authenticity of eoliths insisted that some of the Kentish types would be looked for in vain among the machine-made specimens from Mantes;84 but a sceptic affirmed that he had himself found an eolith, manifestly untouched by man, with its notch accurately fitting against another stone, the two having been ground together by a natural process which he described as the slipping, sliding, and foundering of the insoluble surface material from higher to lower levels.85 Although it was objected that certain rectangular eoliths with blunt edges could not have been produced except by art,86 it is permissible to doubt whether the human origin of eoliths will ever be established beyond dispute; and he who reflects that they have been met with not only in Tertiary beds but in those immeasurably later deposits which were contemporary with or but little older than palaeolithic man87 will leave them for the present without regret to the consideration of enthusiasts.
The environment of palaeolithic man in Britain.
Let us then try to conceive of the environment of those palaeolithic hunters of whose culture we have clearer indications in a late phase of the Ice Age, when the glaciers of Southern Britain had passed away. Then the configuration of the country was very different from that which we behold. The chalk ranges of Kent and of Picardy were unbroken. The Thames, fed sometimes by torrential rains, flowing rapidly and fitfully in the broad shallow valley which it was excavating, was depositing gravels on the slopes that bordered it, a hundred feet above the level of its existing waters,88 and wandering far eastward across a plain from whose now sunken surface bones of mammoth and reindeer, of hyena and bear have been dredged, to swell that greater Rhine which found no outlet till it reached a far northern sea. Mammoths, woolly rhinoceroses, and giant elks with antlers ten feet across, roamed in the forests; hippopotamuses swam in the streams;89 brown bears and grizzly bears and lions and hyenas made their dens in caves, and dragged into their dark and sinuous recesses the prey which they had torn down in the open.
Whence did he come?
The earlier palaeolithic immigrants, impelled perhaps by scarcity of game, had crossed the valley of the Dover Strait doubtless from the nearer parts of France or Belgium; but the original home of the race is unknown, for palaeolithic tools have been found not only in this island and almost every European country except Scandinavia, but also in North Africa, in the valley of the Nile,90 in Palestine and Asia Minor, the Euphrates Valley, Somaliland, India, and North America: as a high authority has remarked, they are ‘so identical in form and character with British specimens that they might have been manufactured by the same hands’;91 and the same may be said of those which were wrought by the Tasmanians, who, fifty years ago, had not yet been exterminated by the pioneers of Christian civilization.92
Chronological puzzles.
Many attempts have been made to calculate the number of millenniums that have elapsed since our Palaeolithic Age began and since it came to its end. Croll, the author of the astronomical theory of the Ice Age, finally concluded that that epoch ceased about eighty thousand years ago;93 and Sir Archibald Geikie laboured in his youth to estimate the time which the rivers would have taken to excavate their valleys from the days when they were depositing the high-level gravels to the era when they reached their present depth.94 But any one who uses his powers of reflection will see how many elements of uncertainty must stultify such a method as this;95 and, since the cause of the Ice Age remains unknown, the calculations of Croll were futile.96 Indeed, if it were possible to prove that eighty thousand years have passed since the beginning or since the end of the Palaeolithic Age, not much would be gained; for whose mind can conceive what such a period means? The wiser archaeologists have given up the quest of chronological precision; and they know that the imagination may be stimulated by more legitimate means. Go to Caversham and stand upon the gravels washed down by the Thames in his lusty youth:97 one hundred and twenty feet below he is flowing now; think of the ages that passed while his waters were hollowing out that valley, which was as it is still before the Palaeolithic Age had passed away. Walk along the cliff near Bournemouth, and look out over the Solent Sea. That cliff was once a river bank; and even the cautious geologist who has described how Hampshire was wrought into its present form is willing to believe that man had then appeared in our land. Where you see salt water he would have seen dry land, bounded far away by a range of hills which linked the downs of the Isle of Wight to those that rise behind Weymouth Bay, and of which the Needles remain as lonely relics: he would have seen the Solent flow, a mighty river, enriched by the tribute of the Stour, the Avon, the Itchen, and the Test.98 Ascend the hill on which stands Dover Castle, and gaze upon Cape Grisnez. Let the waters beneath you disappear: across the chalk that once spanned the Channel like a bridge men walked from the white cliff that marks the horizon to where