Quitting Rome in disgust, he employed himself first in making war upon the Parthians, who had naturally, from situation, befriended his Syrian rival. Their capital cities he overthrew; and afterwards, by way of employing his armies, made war in Britain. At the city of York he died; and to his two sons, Geta and Caracalla, he bequeathed, as his dying advice, a maxim of policy, which sufficiently indicates the situation of the empire at that period; it was this--"To enrich the soldiery at any price, and to regard the rest of their subjects as so many ciphers." But, as a critical historian remarks, this was a shortsighted and self-destroying policy; since in no way is the subsistence of the soldier made more insecure, than by diminishing the general security of rights and property to those who are not soldiers, from whom, after all, the funds must be sought, by which the soldier himself is to be paid and nourished. The two sons of Severus, whose bitter enmity is so memorably put on record by their actions, travelled simultaneously to Rome; but so mistrustful of each other, that at every stage the two princes took up their quarters at different houses. Geta has obtained the sympathy of historians, because he happened to be the victim; but there is reason to think, that each of the brothers was conspiring against the other. The weak credulity, rather than the conscious innocence, of Geta, led to the catastrophe; he presented himself at a meeting with his brother in the presence of their common mother, and was murdered by Caracalla in his mother's arms. He was, however, avenged; the horrors of that tragedy, and remorse for the twenty thousand murders which had followed, never forsook the guilty Caracalla. Quitting Rome, but pursued into every region by the bloody image of his brother, the emperor henceforward led a wandering life at the head of his legions; but never was there a better illustration of the poet's maxim, that 'Remorse is as the mind in which it grows: If _that_ be gentle,' &c.