And one thing (aye! and I fear me, many) have I missed to set out with particularness: There was, as you do know, all around the base of the Pyramid, which was five and one-quarter miles every way, a great circle of light, which was set up by the Earth-Current, and burned within a transparent tube; or had that appearance. And it bounded the Pyramid for a clear mile upon every side, and burned for ever; and none of the monsters had power ever to pass across, because of what we did call The Air Clog that it did make, as an invisible Wall of Safety. And it did give out also a more subtile vibration, that did affect the weak Brain-Elements of the monsters and the Lower Men-Brutes. And some did hold that there went from it a further vibration of a greater subtileness that gave a protecting against the Evil Forces. And some quality it had truly thiswise; for the Evil Powers had no ability to cause harm to any within. Yet were there some dangers against which it might not avail; but these had no cunning to bring harm to any _within_ the Great Redoubt who had wisdom to meddle with no dreadfulness. And so were those last millions guarded until the Earth-Current should be used to its end. And this circle is that which I have called the Electric Circle; though with failure to explain. But there it was called only, The Circle. And thus have I, with great effort, made a little clear that grim land of night, where, presently, my listening heard one calling across the dark. And how that this grew upon me, I will set out forthwith. III THE QUIET CALLING Now, oft had I heard tell, not only in that great city which occupied the thousandth floor, but in others of the one thousand, three hundred and twenty cities of the Pyramid, that there was somewhere out in the desolation of the Night Lands a second Place of Refuge, where had gathered, in another part of this dead world, some last millions of the human race, to fight unto the end. And this story I heard everywhere in my travels through the cities of the Great Redoubt, which travels began when I came upon my seventeenth year, and continued for three years and two hundred and twenty five days, being even then but one day in each city, as was the custom in the training of every child. And truly it was a great journey, and in it I met with many, whom to know was to love; but whom never could I see again; for life has not space enough; and each must to his duty to the security and well-being of the Redoubt. Yet, for all that I have set down, we travelled much, always; but there were so many millions, and so few years.