Once away from the blasted area, the wolverines ranged ahead at their clumsy gallop, which covered ground at a surprising rate of speed. Shann knew that their curiosity made them scouts surpa.s.sing any human and that the men who followed would have ample warning of any danger to come.

Without reference to his silent trail companion, he sent the animals toward another strip of woodland which would give them cover against the coming of any Throg flyer.

As the hours advanced he began to cast about for a proper night camp.

The woods ought to give them a usable site.

"This is a water wood," Thorvald said, breaking the silence for the first time since they had left the wrecks.

Shann knew that the other had knowledge, not only of the general countryside, but of exploring techniques which he himself did not possess, but to be reminded of that fact was an irritant rather than a rea.s.surance. Without answering, the younger man bored on to locate the water promised.

The wolverines found the small lake first and were splashing along its sh.o.r.e when the Terrans caught up. Thorvald went to work, but to Shann's surprise he did not unstrap the force-blade ax at his belt. Bending over a sapling, he pounded away with a stone at the green wood a few inches above the root line until he was able to break through the slender trunk. Shann drew his own knife and bent to tackle another treelet when Thorvald stopped him with an order: "Use a stone on that, the way I did."

Shann could see no reason for such a laborious process. If Thorvald did not want to use his ax, that was no reason that Shann could not put his heavy belt knife to work. He hesitated, ready to set the blade to the outer bark of the tree.

"Look--" again that impatient edge in the officer's tone, the need for explanation seeming to come very hard to the other--"sooner or later the Throgs might just trace us here and find this camp. If so, they are _not_ going to discover any traces to label us Terran----"

"But who else could we be?" protested Shann. "There is no native race on Warlock."

Thorvald tossed his improvised stone ax from hand to hand.

"But do the Throgs know that?"

The implications, the possibilities, in that idea struck home to Shann.

Now he began to understand what Thorvald might be planning.

"Now there is going to be a native race." Shann made a statement instead of a question and saw that the other was watching him with a new intentness, as if he had at last been recognized as a person instead of rank and file and very low rank at that--Survey personnel.

"There is going to be a native race," Thorvald affirmed.

Shann resheathed his knife and went to search the pond beach for a suitable stone to use in its place. Even so, he made harder work of the clumsy chopping than Thorvald had. He worried at one sapling after another until his hands were skinned and his breath came in painful gusts from under aching ribs. Thorvald had gone on to another task, ripping the end of a long tough vine from just under the powdery surface of the thick leaf ma.s.ses fallen in other years.

With this the officer lashed together the tops of the poles, having planted their splintered b.u.t.ts in the ground, so that he achieved a crudely conical erection. Leafy branches were woven back and forth through this framework, with an entrance, through which one might crawl on hands and knees, left facing the lakeside. The shelter they completed was compact and efficient but totally unlike anything Shann had ever seen before, certainly far removed from the domes of the camp. He said so, nursing his raw hands.

"An old form," Thorvald replied, "native to a primitive race on Terra.

Certainly the beetle-heads haven't come across its like before."

"Are we going to stay here? Otherwise it is pretty heavy work for one night's lodging."

Thorvald tested the shelter with a sharp shake. The matted leaves whispered, but the framework held.

"Stage dressing. No, we won't linger here. But it's evidence to support our play. Even a Throg isn't dense enough to believe that natives would make a cross-country trip without leaving evidence of their pa.s.sing."

Shann sat down with a sigh he made no effort to suppress. He had a vision of Thorvald traveling southward, methodically erecting these huts here and there to confound Throgs who might not ever chance upon them.

But already the Survey officer was busy with a new problem.

"We need weapons----"

"We have our stunners, a force ax, and our knives," Shann pointed out.

He did not add, as he would have liked that they could have had a blaster.

"Native weapons," Thorvald countered with his usual snap. He went back to the beach and crawled about there, choosing and rejecting stones picked out of the gravel.

Shann scooped out a small pit just before their hut and set about the making of a pocket-sized fire. He was hungry and looked longingly now and again to the supply bag Thorvald had brought with him. Dared he rummage in that for rations? Surely the other would be carrying concentrates.

"Who taught you how to make a fire that way?" Thorvald was back from the pond, a selection of round stones about the size of his fist resting between his chest and his forearm.

"It's regulation, isn't it?" Shann countered defensively.

"It's regulation," Thorvald agreed. He set down his stones in a row and then tossed the supply bag over to his companion. "Too late to hunt tonight. But well have to go easy on those rations until we can get more."

"Where?" Did Thorvald know of some supply cache they could raid?

"From the Throgs," the other answered matter of factly.

"But they don't eat our kind of food...."

"All the more reason for them to leave the camp supplies untouched."

"The camp?"

For the first time Thorvald's lips curved in a shadow smile which was neither joyous nor warming. "A native raid on an invaders' camp. What could be more natural? And we'd better make it soon."

"But how can we?" To Shann what the other proposed was sheer madness.

"There was once an ancient service corps on Terra," Thorvald answered, "which had a motto something like this: 'The improbable we do at once; the impossible takes a little longer.' What did you think we were going to do? Sulk around out here in the bush and let the Throgs claim Warlock for one of their pirate bases without opposition?"

Since that was the only future Shann had visualized, he was ready enough to admit the truth, only some shade of tone in the officer's voice kept him from saying so aloud.

4. SORTIE

Five days later they came up from the south so that this time Shann's view of the Terran camp was from a different angle. At first sight there had been little change in the general scene. He wondered if the aliens were using the Terran dome shelters themselves. Even in the twilight it was easy to pick out such landmarks as the com dome with the shaft of a broadcaster spearing from its top and the greater bulk of the supply warehouse.

"Two of their small flyers down on the landing field...." Thorvald materialized from the shadow, his voice a thread of whisper.

By Shann's side the wolverines were moving restlessly. Since Taggi's attack on the Throg neither beast would venture near any site where they could scent the aliens. This was the nearest point to which the men could urge either animal, which was a disappointment, for the wolverines would have been an excellent addition to the surprise sortie they planned for tonight, halving the danger for the men.

Shann ran his fingers across the coa.r.s.e fur on the animals' shoulders, exerting a light pressure to signal them to wait. But he was not sure of their obedience. The foray was a crazy idea, and Shann wondered again why he had agreed to it. Yet he had gone along with Thorvald, even suggested a few modifications and additions of his own, such as the contents of the crude leaf sack now resting between his knees.

Thorvald flitted away, seeking his own post to the west. Shann was still waiting for the other's signal when there arose from the camp a sound to chill the flesh of any listener, a wail which could not have come from the throat of any normal living thing, intelligent being or animal.

Ululating in ear-torturing intensity, the cry sank to a faint, ominous echo of itself, to waver up the scale again.

The wolverines went mad. Shann had witnessed their quick kills in the wilds, but this stark ferocity of spitting, howling rage was new. They answered that challenge from the camp, streaking out from under his hands. Yet both animals skidded to a stop before they pa.s.sed the first dome and were lost in the gloom. A spark glowed for an instant to his right; Thorvald was ready to go, so Shann had no time to try and recall the animals.

He fumbled for those b.a.l.l.s of soaked moss in his leaf bag. The chemical smell from them blotted out that alien mustiness which the wind brought from the campsite. Shann readied the first sopping mess in his sling, snapped his fire sparker at it, and had the ball awhirl for a toss almost in one continuous movement. The moss burst into fire as it curved out and fell.

To a witness it might have seemed that the missile materialized out of the air, the effect being better than Shann had hoped.