"Therefore the work which was begun as soon as the strangers revealed their true nature and which is now well under way shall go on. Most of you know already what that work is, but for one or two who do not and for the benefit of the news broadcasts I shall summarize our position as briefly as is consistent with clarity. "We intend to defend this, our largest city, into which is being brought everything needed of supplies and equipment, and as many men as can work without interfering with each other. The rest of our people are to leave their houses and scatter into widely separated temporary refuges until the issue has been decided. This evacuation may not be necessary, since the enemy will center their attack upon our fortress, knowing that until it has been reduced we are still masters of our planet. "It was decided upon, however, not only in the belief that the enemy may destroy our unprotected centers of population, either wantonly or in anger at our resistance, but also because such a dispersion will give our race the greatest possible chance of survival in the not-at-all-improbable event of the crushing of our defenses here. "One power-driven dome of force is to protect the city proper, and around that dome are being built concentric rings of fortifications housing the most powerful mechanisms of offense and defense possible for us to construct. "Although we have always been a peaceful people our position is not entirely hopeless. The _sine qua non_ of warfare is power, and of that commodity we have no lack. True, without knowledge of how to apply that power our cause would be already lost, but we are not without knowledge of the application. Many of our peace-time tools are readily transformed into powerful engines of destruction. Quedrin Radnor, besides possessing a unique ability in the turning of old things to new purposes, has studied exhaustively the patterns of force employed by the enemy and understands thoroughly their generation, their utilization, and their neutralization. "Finally, the mining and excavating machinery of the Chlorans has been dismantled and studied, and its novel features have been incorporated in several new mechanisms of our own devising. Twenty days is none too long a time in which to complete a program of this magnitude and scope, but that is all the time we have. You wish to ask a question, Councilor Quedrin?" "If you please. Shall we not have more than twenty days? The ship to be loaded will return in that time, it is true, but we can deal with her easily enough. Their ordinary space ships are no match for ours. That fact was proved so conclusively during our one engagement in space that they did not even follow me back here. They undoubtedly are building vessels of vastly greater power, but it seems to me that we shall be safe until those heavier vessels can arrive."