"[Severus] received letters from the præfect of Britain relating that the barbarians there were in a state of insurrection, overrunning the country, driving off booty, and laying every thing waste; so that for the defence of the island there was need either of greater force, or of the presence of the emperor himself. Severus heard this with pleasure, by nature a lover of glory, and anxious, after his victories in the east and north and his consequent titles, to obtain a trophy from the Britons: moreover, willing to withdraw his sons from Rome, that they might grow up in the discipline and sobriety of a military life, far removed from the blandishments and luxury prevalent in Rome, he orders an expedition against Britain, although now old and labouring under an arthritic affection; but as to his mind, he was vigorous beyond any youth. For the most part he performed the march carried in a litter, nor did he ever continue long in one place. Having completed the journey with his sons, and crossed over the sea more quickly than could be described or expected, he advanced against the Britons, and having drawn together his soldiers from all sides, and concentrated a vast force, he prepared for the war. "The Britons, much struck with the sudden arrival of the emperor, and learning that such a mighty force was collected against them, sent ambassadors, sued for peace, and were willing to excuse their past transgressions. But Severus, purposely seeking delay that he might not again return to Rome without his object, and, moreover, desirous to obtain from Britain a victory and a title, sent away their ambassadors without effecting their purpose, and prepared all things for the contest. He more especially endeavoured to render the marshy places stable by means of causeways, that his soldiers, treading with safety, might easily pass them, and, having firm footing, fight to advantage. For many parts of the British country, being constantly flooded by the tides of the ocean, become marshy. In these the natives are accustomed to swim and traverse about being immersed as high as their waists: for going naked as to the greater part of their bodies, they contemn the mud. Indeed they know not the use of clothing, but encircle their loins and necks with iron; deeming this an ornament and an evidence of opulence, in like manner as other barbarians esteem gold. But they puncture their bodies with pictured forms of every sort of animals; on which account they wear no clothing, lest they should hide the figures on their body. They are a most warlike and sanguinary race, carrying only a small shield and a spear, and a sword girded to their naked bodies. Of a breast-plate or an helmet they know not the use, esteeming them an impediment to their progress through the marshes; from the vapours and exhalations of which the atmosphere in that country always appears dense.