Dworn hit the ground with almost stunning force. His hold on the girl was broken and he was rolled helplessly over and over by his own momentum. But he fetched up on hands and knees, bruised and breathless but unhurt.

From the corner of his eye he saw Qanya sitting up dizzily, half-buried in the drifted sand that had broken their fall. Apparently she too was uninjured, but she was staring in horrified fascination after her runaway machine.

The spider careened onward, no hand at its controls. It hit the line of crawling little machines coming from underground; it knocked one spinning end over end, and stepped squarely on another, stamping it flat. It recovered its balance amazingly, and loped on, even though one leg was buckling beneath it—

Then it was hit dead-on by what must have been at least a hundred-pound high explosive rocket.

The winged killers shot low overhead with an exultant whoop of jets, peeling off to right and left of the column of smoke that rose and towered where the spider had been struck. Out of the cloud, metal fragments soared glinting upward and arced back to earth, and on the ground, amid smoke and dust, a metal limb was briefly visible, flexing convulsively and growing still.

Dworn heard a smothered sound beside him. A tear rolled down Qanya's smudged cheek, and Dworn thought fuzzily, Even spiders can cry. Only, he corrected, she's not a spider any more she's now just a ghost like me.

If he hadn't been a ghost already, if he hadn't lost his own machine—the idea of jumping clear and saving both their human lives while letting the spider be destroyed would never have occurred to him.

He came to himself, hissed, "Down! Keep low and maybe they'll overlook us!"

They huddled together on the slope of the sandhill, while the victorious flying enemy circled round in a miles-wide sweep and began descending toward their base again, wing-flaps braking them for landing.

And on the ground meanwhile, the crawlers which had come from the tunnel were proceeding on their way, leaving two of their number behind with strange indifference to their own casualties.