thick as to constitute armor for their own protection, were so cunningly joined and sprung that they, too, seemed like part of a living thing.

It came within twenty yards of the staff-car with the 'copter man in it and Sergeant Walpole smoking outside. It ignored them. It had destroyed all life at this place. And Sergeant Walpole alone was visible, and he sat motionless and detached, unemotionally waiting to be killed. The Wabbly clanked and rumbled and roared obliviously past them. Sergeant Walpole saw the flexing springs in the tread-joints, and there were hundreds of them, of a size to support a freight-car. He saw a refuse-tube casually ejecting a gush of malodorous stuff, in which the garbage of a mess-table was plainly identifiable. A drop or two of the stuff splashed on him, and he smelled coffee.

And then the treads lifted, and he saw the monstrous gas-spreading tubes at the stern, and the exhaust-pipes into which he could have ridden, monocycle and all. Then he saw a man in the Wabbly. There were ventilation-ports open at the pointed stern and a man was looking out, some fifteen feet above the ground, smoking placidly and looking out at the terrain the Wabbly left behind it. He was wearing an enemy uniform cap.

The monster went on. The roar of its passing diminished a little. And the 'copter man came suddenly out of the staff-car, struggling with the portable vision set.

"I think we can do it," he said shortly. "It's in constant beam communication with a bomber up aloft, and I think they're worried up there because they can't see a damned thing. But it's a good team. With the Wabbly's beam, which takes so much power no bomber could possibly carry it, the bombers are safe, and the bombers can locate any motor-driven thing that might attack the Wabbly and blow it to hell. But right now they can't see it. So I think we can do it. Coming?"

Sergeant Walpole threw away his cigarette and rose stiffly. Even those few moments of rest had intensified his weariness. He flung a leg over the monocycle's seat and pointed tiredly to the trail of the Wabbly. It nearly paralleled, here, a ribbon of concrete road which once had been a reasonably important feeder-highway.

"Let's go."

They went off through the rain along the road, nearly parallel to the route the Wabbly was taking. Rain beat at them. Off in the woods to their right the Wabbly's noise grew louder as they overtook it. They passed it, and came abruptly out of the wooded area upon 

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