The chief of these was Alexander Romanoff, last of the Tsars, or Tyrants, of Russia, whose armies, leagued with those of France, Italy, Spain, and certain lesser Powers, and assisted by a great fleet of war-balloons that could fly, though slowly, wherever they were directed, swept like a destroying pestilence from the western frontiers of Russia to the eastern shores of Britain; and when they had gained the mastery of Europe, invaded England and laid siege to London. But here their path of conquest was brought to an end, for Alan Tremayne and his brothers of the Terror called upon the men of Anglo-Saxondom to save their Motherland from her enemies, and they rose in their wrath, millions strong, and fell upon them by land and sea, and would have destroyed them utterly, as I had bidden them do, but that Natasha, who was my daughter and was known in those days as the Angel of the Revolution, pleaded for the remnant of them, and they were spared. But the Russians we slew without mercy to the last man of those who had stood in arms against us, saving only the Tyrant and his princes and the leaders of his armies. These we took prisoners and sent, with their wives and their children, to die in their own prison-land in Siberia, as they had sent thousands of innocent men and women to die before them. This was my judgment upon them for the wrong that they had done to me and mine, for in the hour of victory I spared not those who had not known how to spare. Now they are dead, and their graves are nameless. Their name is a byword among men, for they were strong and they used their strength to do evil. So we made an end of tyranny among the nations, and when the world-war was at length brought to an end, we disbanded all the armies that were upon land and sank the warships that were left upon the sea, that men might no more fight with each other. War, that had been called honourable since the world began, we made a crime of blood-guiltiness, for which the life of him who sought to commit it should pay; and as a crime, you, the children of those who have delivered the nations from it, shall for ever hold it to be. We leave you the command of the air, and that is the command of the world; but should it come to pass--as in the progress of knowledge it may well do--that others in the world outside Aeria shall learn to navigate the air as you do, you shall go forth to battle with them and destroy them utterly, for we have made it known through all the earth that he who seeks to build a second navy of the air shall be accounted an enemy of peace, whose purpose it is to bring war upon the earth again. Forget not that the blood-lust is but tamed, not quenched, in the souls of men, and that long years must pass before it is purged from the world for ever. We have given peace on earth, and to you, our children, we bequeath the sacred trust of keeping it. We have won our world-empire by force, and by force you must maintain it.