One hand closed upon the metal tube that the other hand raised, and, with his final reserve of strength, the flyer wrapped an arm about the tall body and rushed it stumblingly toward the cliff. To be balked now!--to be brought back to that intolerable prison and the unthinkable role of traitor! The khaki-clad figure wrenched furiously at the deadly tube as they struggled and swayed on the edge of the cliff. He freed his arm quickly, and, regardless of the clawing thing that tore at his face and eyes, he launched one long swing for the horrible face above him. He saw the awkward fall of a lean body, and he swayed helplessly out to follow when the grip of Sykes' hand pulled him back and up to momentary safety. McGuire's mind held only the desire to kill, and he would have begun a staggering rush toward the shrieking mob that broke from the cover behind them, had not Sykes held him fast. At sight of the weapon, their own gas projector, still clutched in the flyer's hand, the pursuers halted. Their long arms pointed and their shrill calls joined in a chorus that quavered and fell uncertainly. * * * * * One, braver than the rest, dashed forward and discharged his weapon. The spurting gas failed to reach its intended victims; it blew gently back toward the others who fled quickly to either side. Above the trees a giant ship nosed swiftly down, and McGuire pointed to it grimly and in silence. The men before them were massed now for a rush. "This is the end," said the flyer softly. "I wonder how this devilish thing works; there's a trigger here. I will give them a shot with the wind helping, then we'll jump for it." The ship was above them as the slim figure of Lieutenant McGuire threw itself a score of paces toward the waiting group. From the metal tube there shot a stream of pale vapor that swept downward upon the others who ran in panic from its touch. Then back--and a grip of a hand!--and two Earth-men who threw themselves out and downward from a sheer rock wall to the cool embrace of deep water. They came to the top, battered from their fall, but able to dive under a wave and emerge again near one another. "Swim!" urged Sykes. "Swim out! They may get us here--recover our bodies--resuscitate us. And that wouldn't do!" Another wave, and the two men were swimming beyond it; swimming feebly but steadily out from shore, while above them a great cylinder of shining metal swept past in a circling flight. They kept on while their eyes, from the wave tops, saw it turn and come slowly back in a long smooth descent. It was a hundred feet above the water a short way out at sea, and the two men made feeble motions with arms and legs, while their eyes exchanged glances of dismay. * * * * *