There was no dust⁠—nowhere in these caverned spaces had I found this constant companion of ours in the world overhead. My eyes caught a sparkle from a corner. Pursuing it I found upon one of the low seats a flat, clear crystal oval, remarkably like a lens. I took it and stepped up on the balcony. Standing on tiptoe I found I commanded from the bottom of a window slit a view of the bridge approach. Scanning it I could see no trace of the garrison there, nor of the green spear flashes. I placed the crystal to my eyes⁠—and with a disconcerting abruptness the cavern mouth leaped before me, apparently not a hundred feet away; decidedly the crystal was a very excellent lens⁠—but where were the guards?

I peered closely. Nothing! But now against the aperture I saw a score or more of tiny, dancing sparks. An optical illusion, I thought, and turned the crystal in another direction. There were no sparklings there. I turned it back again⁠—and there they were. And what were they like? Realization came to me⁠—they were like the little, dancing, radiant atoms that had played for a time about the emptiness where had stood Sorgar of the Lower Waters before he had been shaken into the nothingness! And that green light I had noticed⁠—the Keth!