When Phil Holmes started off to the water-hole, his head was full of the earth-borer and the imminent descent. Now that the long-awaited time had come, he was at fever-pitch to be off, and it did not take him long to cover the mile of sandy waste. His thoughts were far inside the earth as he dipped the jug into the clear cool water and sloshed it full. So the rope that snaked softly through the air and dropped in a loop over his shoulders came as a stark surprise. Before he knew what was happening it had slithered down over his arms and drawn taut just above the elbows, and he was yanked powerfully backwards and almost fell. But he managed to keep his feet as he staggered backward, and turning his head he saw the small dark figure of his aggressor some fifteen feet away, keeping tight the slack. Phil's surprise turned to sudden fury and he completely lost his head. What he did was rash; mad; and yet, as it turned out, it was the only thing that could have saved him. Instinctively, without hesitating one second, and absolutely ignoring an excited command to stand still, he squirmed face-on to his aggressor, lowered his head and charged. The distance was short. Halfway across it, a gun barked, and he heard the bullet crack into the water jug, which he was still holding in front of himself. And even before the splintered fragments reached the ground he had crashed into the firer. He hit him with all the force of a tackling lineman, and they both went down. The man grunted as the wind was jarred out of him, but he wriggled like an eel and managed to worm aside and bring up his gun. Then there was a desperate flurry of bodies in the coarse sand. Holmes dived frantically for the gun hand and caught it; but, handicapped as he was by the rope, he could not hold it. Slowly its muzzle bent upward to firing position. Desperately, he wrenched the arm upwards, in the direction it had been straining to go, and the sudden unexpected jerk doubled the man's arm and brought the weapon across his chest. For a moment there was a test of strength as Phil lay chest to chest over his opponent, the gun blocked between. Then the other grunted; squirmed violently--and there was a muffled explosion. A cry of pain cut the midnight air, and with insane strength Holmes' ambusher fought free from his grip, staggered to his feet and went reeling away. Phil tore loose from the rope and bounded after him, never feeling, at the moment, his powder-burned chest. And then he halted in his tracks. A great roar came thundering over the desert! * * * * * At once he knew that it came from the earth-borer's disintegrators. The sphere had started down without him. He stood stock still, petrified with surprise, facing the sound, while his attacker melted farther and farther into the night. And then, suddenly, Phil Holmes was sprinting desperately back towards the Guinness camp.