This short sketch suffices to show their power of expansion in ancient times among thickly-settled populations. When we have shown, farther on, how to-day they are spreading all over the world, not looking to wild and desert countries, but to large centres of population in the English colonies, we shall be able to convince ourselves that they still present the same characteristic. If they do not bear arms in their hands, it is owing to altered circumstances; but their actual expansion bears a close resemblance to that of ancient times, and the similarity of effect shows the similarity of character.
We pass now to a new feature in the race, which has not, to our knowledge, been sufficiently dwelt upon. All their migrations in old times were across continents; and if, occasionally, they crossed the Mediterranean Sea, they did so always in foreign vessels.
The Celtic race, as we have seen, occupied the whole of Western Europe. They had, therefore, numerous harbors on the Atlantic, and some excellent ones on the Mediterranean. Many passed the greater portion of their lives on the sea, supporting themselves by fishing; yet they never thought of constructing and arming large fleets; they never fought at sea in vessels of their own, with the single exception of the naval battle between Julius Caesar and the Veneti, off the coast of Armorica, where, in one day, the Roman general destroyed the only maritime armament which the Celts ever possessed.
And even this fact is not an exception to the general rule; for M. de Penhouet, the greatest antiquarian, perhaps, in Celtic lore in Brittany, has proved that the Veneti of Western Gaul were not really Celts, but rather a colony of Carthaginians, the only one probably remaining, in the time of Caesar, of those once numerous foreign colonies of the old enemies of Rome.
Still this strange anomaly, an anomaly which is observable in no other people living on an extensive coast, was not produced by ignorance of the uses and importance of large fleets. From the first they held constant intercourse with the great navigators of antiquity. The Celtic harbors teemed with the craft of hardy seamen, who came from Phoenicia, Carthage, and finally from Rome. Heeren, in his researches on the Phoenicians, proves it for that very early age, and mentions the strange fact that the name of Ireland with them was the "Holy Isle." For several centuries, the Carthaginians, in particular, used the harbors of Spain, of Gaul, even of Erin and Britain, as their own. The Celtic inhabitants of those countries allowed them to settle peaceably among them, to trade with them, to use their cities as emporiums, to call them, in fact, Carthaginian harbors, although that African nation never really colonized the country, does not appear to have made war on the inhabitants in order to occupy it, except in a few instances, when thwarted, probably, in their commercial enterprises; but they always lived on peaceful terms with the aborigines, whom they benefited by their trade, and, doubtless, enlightened by the narrative of their expeditions in distant lands.
Is it not a strikingly strange fact that, under such circumstances, the Celts should never have thought of possessing vessels of their own, if not to push the enterprises of an extensive commerce, for which they never showed the slightest inclination, at least for the purpose of shipping their colonies abroad, and crossing directly to Greece from Celtiberia, for instance, or from their Italian colony of the Veneti, replaced in modern times by maritime Venice? Yet so it was; and the great classic scholar, Heeren, in his learned researches on the Phoenicians and Carthaginians, remarks it with surprise. The chief reason which he assigns for the success of those southern navigators from Carthage in establishing their colonies everywhere, is the fact of no people in Spain, Gaul, or the British Isles, possessing at the time a navy of their own; and, finding it so surprising, he does not attempt to explain it, as indeed it really remains without any possible explanation, save the lack of inclination springing from the natural promptings of the race.
What renders it more surprising still is, that individually they had no aversion to a seafaring life; not only many of them subsisted by fishing, but their curraghs covered the sea all along their extensive coasts. They could pass from island to island in their small craft. Thus the Celts of Erin frequently crossed over to Scotland, to the Hebrides, from rock to rock, and in Christian times they went as far as the Faroe group, even as far as Iceland, which some of them appear to have attempted to colonize long before the Norwegian outlaws went there; and some even say that from Erin came the first Europeans who landed on frozen Greenland years before the Icelandic Northmen planted establishments in that dreary country. The Celts, therefore, and those of Erin chiefly, were a seafaring race.
But to construct a fleet, to provision and arm it, to fill it with the flower of their youth, and send them over the ocean to plunder and slay the inhabitants for the purpose of colonizing the countries they had previously devastated, such was never the character of the Celts. They never engaged extensively in trade, or what is often synonymous, piracy. Before becoming christianized, the Celts of Ireland crossed over the narrow channel which divided them from Britain, and frequently carried home slaves; they also passed occasionally to Armorica, and their annals speak of warlike expeditions to that country; but their efforts at navigation were always on an extremely limited scale, in spite of the many inducements offered by their geographical position. The fact is striking when we compare them in that particular with the Scandinavian free-rovers of the Northern Ocean.
It is, therefore, very remarkable that, whenever they got on board a boat, it was always a single and open vessel. They did so in pagan times, when the largest portion of Western Europe was theirs; they continued to do so after they became Christians. The race has always appeared opposed to the operations of an extensive commerce, and to the spreading of their power by large fleets.
The ancient annals of Ireland speak, indeed, of naval expeditions; but these expeditions were always undertaken by a few persons in one, two, or, at most, three boats, as that of the sons of Ua Corra; and such facts consequently strengthen our view. The only fact which seems contradictory is supposed to have occurred during the Danish wars, when Callaghan, King of Cashel, is said to have been caught in an ambush, and conveyed a captive by the Danes, first to Dublin, then to Armagh, and finally to Dundalk.