It was governed by lieutenants, or deputies, sent from Rome, as Ireland is now by deputies from England; and continued thus under the Romans for about 460 years; till that empire being invaded by the Goths and Vandals, the Romans were forced not only to recall their own armies, but also to draw from hence the bravest of the Britons, for their assistance against those barbarians.
Picts.
Picts' Wall.
The Roman conquests in this island reached no further northward than to that part of Scotland where Stirling and Glasgow are seated: The region beyond was held not worth the conquering: It was inhabited by a barbarous people, called Caledonians and Picts; who, being a rough fierce nation, daily infested the British borders.

Therefore the Emperor Severus built a wall, from Stirling to Glasgow, to prevent the invasions of the Picts: It is commonly called the Picts' Wall.
A.D.455.

Saxons.
These Picts and Caledonians, or Scots, encouraged by the departure of the Romans, do now cruelly infest and invade the Britons by sea and land: The Britons choose Vortigern for their king, who was forced to invite the Saxons (a fierce Northern people) to assist him against those barbarians.

The Saxons came over, and beat the Picts in several battles; but, at last, pick quarrels with the Britons themselves; and, after a long war, drive them into the mountains of Wales and Cornwall, and establish themselves in seven kingdoms in Britain, (by them now called England).

These seven kingdoms are usually styled the Saxon Heptarchy.
A.D.460.