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 358 the temperature of the climate, and the fertility of the soil, alike adapted for the production of corn or of vines; the valuable minerals with which it abounded; its rich pastures covered with innumerable flocks, and its woods free from wild beasts or venomous serpents. Above all, they regretted the large amount of the revenue of Britain, whilst they confessed that such a province well deserved to become the seat of an independent monarchy. During the space of seven years, it was possessed by Carausius; and fortune continued propitious to a rebellion supported with courage and ability. The British emperor defended the frontiers of his dominions against the Caledonians of the North, invited from the continent a great number of skilful artists, and displayed, on a variety of coins that are still extant, his taste and opulence. Born on the confines of the Franks, he courted the friendship of that formidable people, by the flattering imitation of their dress and manners. The bravest of their youth he enlisted among his land or sea forces; and, in return for their useful alliance, he communicated to the barbarians the dangerous knowledge of military and naval arts. Carausius still preserved the possession of Boulogne and the adjacent country. His fleets rode triumphant in the channel, commanded the mouths of the Seine and of the Rhine, ravaged the coasts of the ocean, and diffused, beyond the Columns of Hercules, the terror of his name. Under his command, Britain, destined in a future age to obtain the empire of the sea, already assumed its natural and respectable station of a maritime power.

By seizing the fleet of Boulogne, Carausius had deprived his master of the means of pursuit and revenge. And, when, after vast expense of time and labour, a new armament was launched into the water, the Imperial troops, unaccustomed to that