Britain by its situation was removed from the fury of these barbarous incursions; and being also a remote province, not much valued by the Romans, the legions which defended it were carried over to the protection of Italy and Gaul. But that province, though secured by the sea against the inroads of the greater tribes of barbarians, found enemies on its frontiers, who took advantage of its present defenceless situation. The Picts and Scots, who dwelt in the northern parts, beyond the wall of Antoninus, made incursions upon their peaceable and effeminate neighbours; and besides the temporary depredations which they committed, these combined nations threatened the whole province with subjection, or what the inhabitants more dreaded, with plunder and devastation. The Picts seem to have been a tribe of the native British race, who, having been chased into the northern parts by the conquest of Agricola, had there intermingled with the ancient inhabitants: the Scots were derived from the same Celtic origin, had first been established in Ireland, had migrated to the north-west coasts of this island, and had long been accustomed, as well from their old as their new seats, to infest the Roman province by piracy and rapine [p]. These tribes, finding their more opulent neighbours exposed to invasion, soon broke over the Roman wall, no longer defended by the Roman arms; and, though a contemptible enemy in themselves, met with no resistance from the unwarlike inhabitants. The Britons, accustomed to have recourse to the emperors for defence as well as government, made supplications to Rome; and one legion was sent over for their protection. This force was an overmatch for the barbarians, repelled their invasion, routed them in every engagement, and having chased them into their ancient limits, returned in triumph to the defence of the southern provinces of the empire [q]. Their retreat brought on a new invasion of the enemy. The Britons made again an application to Rome, and again obtained the assistance of a legion, which proved effectual for their relief: but the Romans, reduced to extremities at home, and fatigued with those distant expeditions, informed the Britons that they must no longer look to them for succour, exhorted them to arm in their own defence, and urged that, as they were now their own masters, it became them to protect by their valour that independence which their ancient lords had conferred upon them [r]. That they might leave the island with the better grace, the Romans assisted them in erecting anew the wall of Severus, which was built entirely of stone, and which the Britons had not at that time artificers skilful enough to repair [s]. And having done this last good office to the inhabitants, they bid a final adieu to Britain, about the year 448; after being masters of the more considerable part of it during the course of near four centuries. [FN [p] See note [A] at the end of the volume. [q] Gildas. Bede, lib. 1. cap. 12.