Jellico arose, and Dane, interested, followed. Some five minutes later none of them needed the native keenness of smell to detect the presence of some foulness ahead. The odor of corruption was almost tangible in the sultry air. And it grew worse until they stood on the edge of a pit.

Dane retreated hurriedly. This was as bad as the battlefield of the rock apes. But the captain and the two Khatkans stood calmly a.s.sessing the slaughter left by the hide poachers.

"Glam, graz, hoodra," Jellico commented. "Tusks and hides--the full line of trade stuff."

Asaki, his expression bleak, stepped back from the pit. "Day old calves, old ones, females--all together. They kill wantonly and leave those they do not choose to pelt."

"Trail--" Nymani pointed eastward. "Leads to Mygra swamp."

"The swamps!" Asaki was shaken. "They must be mad!"

"Or know more about this country than your men do," Jellico corrected.

"If poachers can enter Mygra, then we can follow!"

But not now, Dane protested silently. Certainly Asaki did not mean that _they_ were to track outlaws into swamps the Khatkan had already labeled unexplored death traps!

V

Sitting up, Dane stared wide-eyed into the dark. A handful of glowing coals, guarded by rocks, was the center of their camp. He hunched up to that hardly knowing why he moved. His hands were shaking, his skin damp with sweat no heat produced. Yet, now that he was conscious of the night, the Terran could not remember the nightmare from which he had just awakened, though he was left with a growing apprehension which he could not define. What prowled out there in that dark? Walked the mountain side? Listened, spied and waited?

Dane half started to his feet as a form did move into the dim light of the fire. Tau stood there, regarding him with sober intensity.

"Bad dream?"

The younger man admitted to that with a nod, partly against his will.

"Well, you aren't the only one. Remember any of it?"

With an effort, Dane looked away from the encircling dark. It was as if the fear which had shaken him awake, now embodied, lurked right there.

"No." He rubbed sleep-smarting eyes.

"Neither did I," Tau remarked. "But both of 'em must have been jet-powered."

"I suppose one could expect to have nightmares after yesterday." Dane advanced the logical explanation, yet at the same time something deep inside him denied every word of it. He had known nightmares before; none of them had left this aftertaste. And he wanted no return of sleep tonight. Reaching to the pile of wood he fed the fire as Tau settled down beside him.

"There is something else...." the medic began, and then fell silent.

Dane did not press him. The younger man was too busy fighting a growing desire to whirl and aim the fire ray into that darkness, to catch in its withering blast that lurking thing he could _feel_ padded there, biding its time.

Despite his efforts Dane did drowse again before morning, waking unrefreshed, and, to his secret dismay, with no lessening of his odd dislike for the country about them.

Asaki did not suggest that they trail the poachers into the mora.s.s of Mygra. Instead the Chief Ranger was eager to press on in the opposite direction, find a way over the range to the preserve where he could a.s.semble a punitive force to deal with the outlaws. So they began an upward climb which took them away from the dank heat of the lowlands, into the parched blaze of the sunbaked ledges above.

The sun was bright, far too bright, and there were few shadows left. Yet Dane, stopping to drink sparingly from his canteen, could not lose that sense of eyes upon him, of being tracked. Rock apes? Cunning as those beasts were, it was against their nature to trail in utter silence, to be able to carry through a long-term project. Lion, perhaps?

He noted that Nymani and Asaki took turns at rear guard today, and that each was alert. Yet, oddly enough, none of them mentioned the uneasiness they must all share.

They had a dry climb, finding no mountain stream to renew their water supply. All being experienced in wilderness travel, they made a mouthful of liquid go a long way. When the party halted slightly before midday, canteens were still half full.

"_Haugh!_"

They jerked up, hands on weapons. A rock ape, its hideous body clearly seen here, capered, coughed, spat. Asaki fired from the hip and the thing screeched, clawed at its chest where the dark blood spewed out, and raced for them. Nymani cut the beast down and they waited tensely for the attack of the thing's tribe, which should have followed the abortive lunge on the part of their scout. But there was nothing--neither sound nor movement.

What did follow froze them all momentarily. That mangled body began to move again, drew itself together, crawled toward them. Dane knew that it was impossible that the creature could live with such wounds. Yet the beast advanced, its head lolling on its hunched shoulders so that the eyes were turned blindly up to the full glare of the sun, while it crawled to reach the man it could not see.

"Demon!" Nymani dropped his needler, shrank back against the rocks.

As the thing advanced, before their eyes the impossible happened. Those gaping wounds closed, the head straightened on the almost invisible neck, the eyes glared once more with life, and slaver dripped from the swine snout.

Jellico caught up the needler Nymani had dropped. With a coolness Dane envied, the captain shot. And for the second time the rock ape collapsed, torn to ribbons.

Nymani screamed, and Dane tried to choke back his own cry of horrified protest. The dead thing put on life for the second time, crawled, got somehow to its feet, healed itself, and came on. Asaki, his face greenish-pale, stepped out stiffly as if each step he took was forced by torture. He had dropped his needler. Now he caught up a rock as large as his own head, raised it high with arms on which the muscles stood out like ropes. He hurled the stone, and Dane heard as well as saw the missile go home. The rock ape fell for the third time.

When one of those taloned paws began to move again, Nymani broke. He ran, his screams echoing thinly in the air, as the thing lurched up, the gory mess of its head weaving about. If his feet would have obeyed him, Dane might have followed the Khatkan. As it was, he drew his ray and aimed it at that shambling thing. Tau struck up the barrel.

The medic's face was livid; there was the same horror in his eyes. But he moved out to front that monster.

A spot of shadow coalesced on the ground, deepened in hue, took on substance. Crouched low facing the rock ape, its haunches quivering for a deadly spring, narrowed green eyes holding on its prey, was a black leopard.

The tiny forward and backward movements of its body steadied, and it arched through the air, brought down the ape. A pitting, snarling tangle rolled across the slope--and was gone!

Asaki's hands shook as he drew them down his sweating face. Jellico readied a second clip in the needler mechanically. But Tau was swaying so that Dane leaped to take the shock of the other's weight as he collapsed. Only for a moment did the medic hang so, then he struggled to stand erect.

"Magic?" Jellico's voice, as controlled as ever, broke the silence.

"Ma.s.s hallucination," Tau corrected him. "Very strong."

"How!" Asaki swallowed and began again. "How was it done?"

The medic shook his head. "Not by the usual methods, that is certain.

And it worked on us--on me--when we weren't conditioned. I don't understand that!"

Dane could hardly believe it yet. He watched Jellico stride to where the tangle of struggling beasts had rolled, saw him examine bare ground on which no trace of the fight remained. They must accept Tau's explanation; it was the only sane one.

Asaki's features were suddenly convulsed with a rage so stark that Dane realized how much a veneer was the painfully built civilization of Khatka.

"_Lumbrilo!_" The Chief Ranger made of that name a curse. Then with a visible effort he controlled his emotions and came to Tau, looming over the slighter medic almost menacingly.

"How?" he demanded for the second time.

"I don't know."

"He will try again?"

"Not the same perhaps--"