But they came on gamely, fiercely. Where there had been thousands, there were but hundreds ... scores ... dozens.... There were only five left. Three of them disappeared at once, but the two remaining came on unhesitatingly, their dirty yellow bat-like wings flapping heavily, their naked heads outstretched, and hooked beaks snapping. One of them disappeared in a little sifting of greasy dust, and the same ray dissolved one wing of the remaining creature. He turned over suddenly, the one good wing flapping wildly, and tumbled towards the waiting swamp that has spawned him. Then, as the ray eagerly followed him, the last of that hellish brood disappeared. "Circle slowly, Mr. Correy," I ordered. I wanted to make sure there were none of these terrible creatures left. I felt that nothing so terrible should be left alive--even in a world of darkness. * * * * * Through the television disc I searched the swamp. As I had half suspected, the filthy ooze held the young of this race of things: grub-like creatures that flipped their heavy bodies about in the slime, alarmed by the light which searched them out. "All disintegrator rays on the swamp," I ordered. "Sweep it from margin to margin. Let nothing be left alive there." I had a well trained crew. The disintegrator rays massed themselves into a marching wall of death, and swept up and down the swamp as a plough turns its furrows. It was easy to trace their passage, for behind them the swamp disappeared, leaving in its stead row after row of broad, dusty paths. When we had finished there was no swamp: there was only a naked area upon which nothing lived, and upon which, for many years, nothing would grow. "Good work," I commended the disintegrator ray men. "Cease action." And then, to Correy, "Put her on her course again, please." * * * * * An hour went by. We passed several more of the strange, damp circular cities, differing from the first we had seen only in the matter of size. Another hour passed, and I became anxious. If we were on our proper course, and I had understood the Chisee messenger correctly, we should be very close to the governing city. We should-- The waving beam of one of the searchlights came suddenly to rest. Three or four other beams followed it--and then all the others. "Large city to port, sir!" called Croy excitedly. "Thank you. I believe it is our destination. Cut all searchlights except the forward beam. Mr. Correy!" "Yes, sir." "You can take her over visually now, I believe. The forward searchlight beam will keep our destination in view for you. Set her down cautiously in the center of the city in any suitable place. And--remain at the controls ready for any orders, and have the operating room crew do likewise." "Yes, sir," said Correy crisply. With a tenseness I could not control, I bent over the hooded television disc and studied the mighty governing city of the Chisee.