Ancient Britain and the Invasions of Julius Caesar. T. Rice Holmes
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by a brother astronomer, he has not hesitated to republish it. Stonehenge, he insists, was originally built a thousand years before the trilithons were added; and the trilithons represent a reconstruction and a re-dedication, which took place about sixteen hundred and eighty years before the birth of Christ. His chronological argument rests upon the assumption that Stonehenge was a temple, consecrated, at its hypothetical second dedication, to the cult of the solstitial sun. Remarking that the avenue extends in the general direction of the sunrise at the summer solstice, he attempted to determine its azimuth. Unhappily the bearing was not everywhere the same. He took the mean, and found that it nearly coincided with a line drawn from the principal bench mark of the Ordnance Survey on Sidbury Hill, the site of an ancient fort, to the centre of Stonehenge. Although there was no evidence that the erection of Stonehenge had the remotest connexion with Sidbury Hill, although the hill itself is not visible from Stonehenge, he found it convenient to discard his own calculation of the azimuth of the avenue and to adopt instead the bearing of the bench mark. Then, making the further assumption that the sun-worshippers adopted as the moment of sunrise the time when the upper tip of the sun first appeared above Sidbury Hill—a phenomenon which is very rare—he ascertained from the rate of change in the obliquity of the ecliptic that it would have been there visible about sixteen hundred and eighty years before the Christian era; or perhaps two centuries earlier or later. Nor did his assumptions end here. Although the Alexandrian astronomer who constructed the Julian calendar miscalculated the date of the summer solstice, he assumed that sixteen centuries earlier the barbarous inhabitants of a northern island could tell it exactly; and he assumed that, in order to observe the sunrise, they stood at the exact point within the circle at which it was convenient to him to place them.915
But such laborious puerilities will not trouble the unlearned wayfarer who feels the enchantment of the past. For him it is enough that Stonehenge was the work of men who felt the majesty of death, and for whom no toil was too great that could do honour to the dead. Chronology has little interest for him: whether Stonehenge was built to hallow the vast necropolis in which it stands, or the dead were brought from afar to lie beneath its shadow, he knows that the three hundred barrows and the great monument are indissolubly connected. The moment when he descried the grey weather-beaten stones on the lonely Wiltshire upland will not fade from his mind. Above the south horizon appeared the slender spire of Salisbury; and the work of the Middle Age and of the Age of Bronze awakened emotions of the same kind: for both were erected in obedience to the thought that man cannot live by bread alone. It may be that those who set up the circle thought differently from the believers who thronged it in later times: the cult of ancestors, the worship of the sun, the adoration of the Celtic deity who was the counterpart of Zeus may have called successive generations of pilgrims to the holy place. Passing beneath the trilithons and among the prostrate stones, one thinks of all that has been done and suffered since mason and digger worked side by side to execute the nameless architect’s design. Time-honoured even when the Roman first landed on our shore, Stonehenge was standing in all its glory when the Greek explorer came who first made known our island to the civilized world.
The voyage of Pytheas.
It was about the time when the conquests of Alexander the Great were revealing the far east to the eager curiosity of the Greeks that Pytheas set forth from Massilia on the peaceful voyage which was to bring Northern Europe within their ken. Such knowledge of Gaul and Britain as had already reached the Mediterranean was of the vaguest kind.916 It has indeed been argued that the Greek word for tin, cassiteros, which occurs in Homer, was of Celtic origin, and was learned by the Greeks from traders who as early as the ninth century before the Christian era procured tin from Cornwall.917 If this conjecture were accepted, it would suggest that the existence of an island somewhere in the far northern ocean was at that time known to a few dwellers in the south. It has also been supposed that the lines in the Odyssey which describe the country of the Laestrygones, where the summer nights were short, were founded upon stories told by sailors who had seen the British Isles;918 but the passage seems more applicable to Scandinavia, which, owing to the amber trade, was from an early period of the Bronze Age connected with South-Eastern Europe. The knowledge that tin was to be got from Cornwall must, however, have reached the Mediterranean at a remote epoch through the ties that connected Britain with Gaul. Himilco, the Carthaginian admiral who, more than a century before the birth of Pytheas, sailed into the English Channel, perhaps undertook his voyage for the purpose of opening up trade with Cornwall at a time when the tin mines of Galicia were nearly exhausted; but it is unlikely that his report, upon which the poem of Festus Avienus was ultimately based, was originally known except to his own government.919 In the time of Pytheas, however, there was a regular overland trade in tin between Cornwall and Massilia, and doubtless also a seaborne trade between Cornwall and the Carthaginian port of Cadiz.920
Pytheas was a great man. As an explorer he was the forerunner of Columbus; and it is not easy for us, who live in an age when hardly any part of the earth’s surface, except the polar regions, remains untrodden, to conceive the animation with which his narrative was discussed by his Greek contemporaries and by the geographers of a later time.921 His scientific eminence is attested by the use which was made of his writings by Eratosthenes, the Alexandrian geographer and poet, and by Hipparchus, the greatest astronomer of the ancient world.922 With a gnomon which he erected in his native town he obtained an estimate of its latitude which erred by no more than a few seconds;923 the observations which he made in the Atlantic enabled him to announce that the height of the tides had a definite relation to the moon’s age;924 he determined with some approach to accuracy the configuration both of Gaul and Britain;925 and at four stations in or near our island he took observations of the altitude of the sun at noon, from which Hipparchus calculated their respective latitudes.926 Unfortunately the work ‘On the Ocean’, which he based on the diary of his voyage,927 has perished. All that we know of it is contained in a few fragments, quoted with more or less accuracy by the astronomer Geminus, who was contemporary with Caesar, by Strabo, Diodorus Siculus, Pliny, and other writers.928 Strabo, influenced by the unimaginative mind of Polybius, was bitterly hostile;929 and his treatise on geography taught many generations of readers to regard Pytheas as a romancer.
It has been supposed that the Government of Massilia, jealous of the commercial predominance of the Carthaginians, and hoping to wrest from them a share of the trade in tin, employed Pytheas as their agent. But the Massiliots already received a constant supply of tin directly from the British mines; and it is hardly credible that they could have expected to profit by importing it oversea round Spain instead of overland.930 Nor indeed could they have expected the Carthaginians, who were all-powerful at sea, to allow their vessels to penetrate into waters which they jealously policed. Polybius, who was affluent, sneeringly remarked that a private individual, in poor circumstances, could not have travelled such distances as Pytheas claimed to have done.931 It is no longer necessary to prove that Pytheas’s travels were real; but, supposing that he could not afford to pay his own expenses, we can only conclude that the Massilian Government, or perhaps a syndicate of merchants, were sufficiently public-spirited to spend money on scientific aims. For although it would seem probable from his having extended his voyage to the amber districts that his object was partly commercial, the fact that he sailed far away from the trade routes, and spent a large part of his time in collecting ethnographical information and making astronomical and geographical observations shows that his own purpose was the advancement of science. It is unnecessary to refute the quaint suggestion that poverty compelled him to work his passage on board a Carthaginian merchantman:932 Carthaginian ship-owners would hardly have permitted a captain to circumnavigate Britain in order to gratify the whim of an alien scientist in the forecastle. If anything that relates to the voyage of Pytheas is certain, it is that he was free to direct the movements of the vessel as he pleased.933
The outward voyage, even before he first saw the British coast, was full of interest. After passing Cape Finisterre, he steered eastward along the northern coast of Spain, and found that, owing to the set of the current and the prevailing westerly winds, the rate of sailing was much more rapid than along the southern side of the Peninsula.934 He touched at Corbilo, a port on the estuary of the Loire, where British tin was unshipped; noted the great bend which the Breton coast makes towards the north-west; and found in the peninsula the same tribe of Osismii whom Caesar encountered nearly three centuries later in his campaign against the Veneti. Having visited