It was hours later, toward the end of the hot, brilliant afternoon, that we parted at last from Kethra and his men. On the green earth around that brown pit where once had stood the city of cylinders, the Khlun air-boats were resting, ready for their long flight homeward across the ice. Our own time-car lay behind us, for in that tense moment before the city had collapsed under the sound-rays’ vibrations, a hovering air-boat had spied our car in the little glade where we had left it, and had managed to raise it from the ground before the crash. And now, with our four friends, we stood beside it, bidding Kethra farewell.
We had heard from him the story, as amazing as our own, of what had befallen his forces when they pursued the Raider into the future, how they had chased him almost to the
