In Europe, where, as we have said, all national frontiers are now fixed and registered, the position of a civilised government entangled in chronic border warfare has long been unknown; the tradition of such a state of things is preserved in popular recollection mainly by local records and old ballads. Yet for Englishmen the subject possesses peculiar interest, since it is connected with their earlier history; and moreover our dominion in India invests it with special importance, for it is there a matter of immediate experience and active concern. We may recollect, in the first place, that Britain was an outlying province of the Roman empire, for at this moment we are excavating the ruins of the wall built by the Romans to protect their northern frontier from the incursions of the warlike tribes beyond it, by the first administration that established, for a time, peace and civilisation in England. Then, in the middle ages, and long afterwards, the border between the kingdoms of England and Scotland which ran northward of the old Roman line, was for centuries the scene of plundering raids, punitive expeditions, and internecine feuds that often laid waste the countryside with fire and sword. We may observe, in this instance, how shifting and indeterminate was the exact frontier line between the two kingdoms, and how the local fighting, the inroads from one side or the other, did not necessarily involve a rupture of their formal relations. The wardens on each side executed rough justice upon marauding clans; they wasted and slaughtered in reprisal for raids; the great nobles engaged in a kind of private warfare; but all this might go on without embroiling the two governments in a national war. On the western English border the Welsh hillmen kept the neighbouring counties in continual alarm; and their chiefs played an important part in the civil wars and rebellions of England. They were at last quieted by Edward I., who succeeded in subduing Wales though he failed in Scotland. Lastly, though the union of the two kingdoms brought peace to the Anglo-Scottish border, the Highland line along the Forth river still kept up, though in a much less serious degree, the troubles of a regular government in contact with restless tribes. Nor was it until the middle of the eighteenth century that these relics of an archaic condition of society, which had long ago disappeared in other parts of western Europe, were finally effaced in Great Britain. Long afterwards, in the nineteenth century, when the conquest of the Punjab carried the north-western frontier of British India up to the slopes of the Afghan mountains, the scene of perpetual strife between a strong settled administration and turbulent borderers which had passed away on the Tweed or the Forth, and on the Welsh Marches, reappeared in the districts beyond the Indus.