But the superior merit of Agricola soon occasioned his removal from the government of Britain; and forever disappointed this rational, though extensive, scheme of conquest. Before his departure the prudent general had provided for security as well as for dominion. He had observed that the island is almost divided into two unequal parts by the opposite gulfs, or, as they are now called, the Friths of Scotland. Across the narrow interval of about forty miles he had drawn a line of military stations, which was afterwards fortified, in the reign of Antoninus Pius, by a turf rampart, erected on foundations of stone. This wall of Antoninus, at a small distance beyond the modern cities of Edinburgh and Glasgow, was fixed as the limit of the Roman province. The native Caledonians preserved, in the northern extremity of the island, their wild independence, for which they were not less indebted to their poverty than to their valor. Their incursions were frequently repelled and chastised, but their country was never subdued. The masters of the fairest and most wealthy climates of the globe turned with contempt from gloomy hills assailed by the winter tempest, from lakes concealed in a blue mist, and from cold and lonely heaths, over which the deer of the forest were chased by a troop of naked barbarians. Such was the state of the Roman frontiers, and such the maxims of imperial policy, from the death of Augustus to the accession of Trajan. XXV. ON THE ATTACKS UPON HIS PENSION.[F] EDMUND BURKE.--1729-1797. In one thing I can excuse the Duke of Bedford for his attack upon me and my mortuary pension: He cannot readily comprehend the transaction he condemns. What I have obtained was the fruit of no bargain, the production of no intrigue, the result of no compromise, the effect of no solicitation. The first suggestion of it never came from me, mediately or immediately, to his Majesty or any of his ministers. It was long known that the instant my engagements would permit it, and before the heaviest of all calamities had forever condemned me to obscurity and sorrow, I had resolved on a total retreat. I had executed that design. I was entirely out of the way of serving or of hurting any statesman or any party, when the ministers so generously and so nobly carried into effect the spontaneous bounty of the crown. Both descriptions have acted as became them. When I could no longer serve them, the ministers have considered my situation. When I could no longer hurt them, the revolutionists have trampled on my infirmity. My gratitude, I trust, is equal to the manner in which the benefit was conferred. It came to me, indeed, at a time of life, and in a state of mind and body, in which no circumstance of fortune could afford me any real pleasure. But this was no fault in the royal donor, or in his ministers, who were pleased, in acknowledging the merits of an invalid servant of the public, to assuage the sorrows of a desolate old man....