again, carefully marking and measuring each spot and taking notes of the instrument readings. When he finished, he had checked the direction of the signal not only by loudness but by phase—he had as accurate a fix as could possibly be had with portable apparatus.

Sourdough growled softly. Sitka Pete whiffed the air and arose from his sitting position. Faro Nell whacked Nugget, sending him whimpering to the farthest corner of the flea place. She stood bristling, facing down-hill the way they'd come.

"Damn!" said Huyghens.

He got up and waved his arm at Semper, who had turned his head at the stirrings. Semper squawked in a most un-eaglelike fashion and dived off the spur and was immediately fighting the down-draught beyond it. As Huyghens reached his weapon, the eagle came back overhead. He went magnificently past, a hundred feet high, careening and flapping in the tricky currents. He screamed, abruptly, and circled and screamed again. Huyghens swung a tiny vision-plate from its strap to where he could look into it. He saw, of course, what the little camera on Semper's chest could see—reeling, swaying terrain as Semper saw it, though without his breadth of field. There were moving objects to be seen through the shifting trees. Their coloring was unmistakable.

"Sphexes," said Huyghens dourly. "Eight of them. Don't look for them to follow our track, Roane. They run parallel to a trail on either side. That way they attack in breadth and all at once when they catch up. And listen! The bears can handle anything they tangle with! It's our job to pick off the loose ones! And aim for the body! The bullets explode."

He threw off the safety of his weapon. Faro Nell, uttering thunderous growls, went padding to a place between Sitka Pete and Sourdough. Sitka glanced at her and made a whuffing noise, as if derisive of her blood-curdling sounds. Sourdough grunted in a somehow solid fashion.

He and Sitka moved farther away from Nell to either side. They would cover a wider front.

There was no other sign of life than the shrillings of the incredibly tiny creatures which on this planet were birds, and Faro Nell's deep-bass, raging growls, and then the click of Roane's safety going off as he got ready to use the weapon Huyghens had given him.

Semper screamed again, flapping low above the treetops, following parti-colored, monstrous shapes beneath.

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