Here follows an incident which illustrates at once the dangers of the time and the wisdom of Theodosius. I quote it from Wright (The Celt, the Roman, and the Saxon, 1852 edition, p. 378):—

“There was in Britain at this time a man named Valentinus, a native of Valeria, in Pannonia, notorious for his intrigues and ambition, who had been sent as an exile to Britain in expiation of some heavy crime. This practice of banishing political offenders to Britain appears to have been, at the time of which we are now speaking, very prevalent; for we learn from the same annalist, that a citizen of Rome, named Frontinus, was at the time of the revolt just described sent into exile in Britain for a similar cause. Men like these no sooner arrived in the island than they took an active part in its divisions, and brought the talent for political intrigue which had been fostered in Italy to act upon the agitation already existing in the distant province. Such was the case with Valentinus, who, as the brother-in-law of one of the deepest agitators of Rome, the vicar Maximinus (described by Ammianus as ille exitialis vicarius), had no doubt been well trained for the part he was now acting. As far as we can gather from the brief notices of the historian, this individual seems, when Theodosius arrived in Britain, to have been actively engaged in some ambitious designs, which the arrival of that great and upright commander rendered hopeless. Theodosius had not been long in Londinium when he received private information that Valentinus was engaged with the other exiles in a formidable conspiracy, and that even many of the military had been secretly corrupted by his promises. With the vigour which characterised all his actions, Theodosius caused the arch-conspirator and his principal accomplices to be seized suddenly, at the moment when their designs were on the point of being carried into execution, and they were delivered over to Duke Dulcitius, to receive the punishment due to their crimes; but, aware of the extensive ramifications of the plot in which they had been engaged, and believing that it had been sufficiently crushed, Theodosius wisely put a stop to all further inquiries, fearing lest by prosecuting them he might excite an alarm which would only bring a renewal of the scenes of turbulence and outrage which his presence had already in a great measure appeased. The prudence as well as the valour of Theodosius were thus united in restoring Britain to peace and tranquillity; and we are assured that when, in 369, he quitted the island, he was accompanied to the port where he embarked by crowds of grateful provincials.”

In the year 383 Britain furnished another usurper or claimant of the people, in the person of Magnus Maximus. He was a native of Spain, who had served in Britain with great distinction, and was a favourite with the soldiers. Now the troops then stationed in Britain are stated by the historian to have been the most arrogant and turbulent of all the Imperial troops.

The career of Maximus, and his ultimate defeat and death at Aquileia, belong to the history of the Roman Empire.

One of the officers of Theodosius, named Chrysanthus, who afterwards became a bishop at Constantinople, pacified Britain—one hopes by methods less brutal than those of Paulus Catena.

The people, however, had little to congratulate themselves upon. Their country with its five provinces was regarded as a department of the Court of Treves. When there was any trouble in the Empire of the West, the legions of Great Britain were withdrawn without the least regard for the defence of the country against the Picts and Scots; and the division into provinces was a source of weakness. Moreover, the general decay of the Empire was accompanied by the usual signs of anarchy, lawlessness, and oppression. The troops were unruly and mutinous; time after time, as we have seen, they set up one usurper and murdered another; they were robbed by their officers; their pay was irregular. The complexity of the new system added to the opportunities of the taxing authorities and the tax-collector. The visit of the Imperial tax-gatherers was worse than the sack of a town by the enemy. Torture was freely used to force the people to confess their wealth; son informed against father, and father against son; they were taxed according to confessions extorted under torture.

The end of the Roman occupation, however, was rapidly approaching. Theodosius died in 395, and left his Western dominions to Honorius. There were still two legions in Britain: the 6th, at Eboracum (York); and the 2nd, at Rutupiæ (Richborough). There were also numerous bodies of auxiliaries. Early in the fifth century these soldiers revolted and set up an Emperor of their own, one Marcus. They murdered him in 407, and set up another named Gratian, whom they also murdered after a few months, when they chose an obscure soldier on account of his name, Constantine.

He at once collected his army and crossed over to Gaul. His subsequent career, like that of Maximus, belongs to the history of Rome.

It would appear that the withdrawal of the legions by Constantine was the actual end of the Roman occupation. The cities of Britain took up arms to repel invasion from the north and the descent of the pirates in the west, and in 410 received letters from Honorius telling them to defend themselves.

The story told by Gildas is to the effect that Maximus took away all the men capable of bearing arms; that the cities of Britain suffered for many years under the oppression of the Picts and Scots; that they implored the Romans for help; and that Roman legions came over, defeated the Picts and Scots, and taught the Britons how to build a wall. This is all pure legend.