I have no way of knowing how old those tunnels are. I suspect, though I can hardly say why, that they antedate the Citadel above them, ancient though it is. It comes to us from the very end of the age when the urge to flight, the outward urge that sought new suns not ours, remained, though the means to achieve that flight were sinking like dying fires. Remote as that time is, from which hardly one name is recalled, we still remember it. Before it there must have been another time, a time of burrowing, of the creation of dark galleries, that is now utterly forgotten.
