Gundersen hesitated. Salamone said, “It’s safe. It can’t work on your nuclei when you take it internally.”

Putting the bowl to his lips, Gundersen took a cautious swig. The venom was sweet but watery.

“—only on your brain,” Salamone added.

Kurtz gently took the bowl from him and set it down on the ground. Now the largest nildor advanced and delicately dipped his trunk into it. Then the second nildor drank, and the third. The bowl now was empty.

Gundersen said, “If it’s poisonous to native life—”

“Not when they drink it. Just when it’s shot directly into the bloodstream,” Salamone said.

“What happens now?”

“Wait,” Kurtz said, “and make your soul receptive to any suggestions that arise.”

Gundersen did not have to wait long. He felt a thickening at the base of his neck and a roughness about his face, and his arms seemed impossibly heavy. It seemed best to drop to his knees as the effect intensified. He turned toward Kurtz, seeking reassurance from those dark shining eyes, but Kurtz’s eyes had already begun to flatten and expand, and his green and prehensile trunk nearly reached the ground. Salamone, too, had entered the metamorphosis, capering comically, jabbing the soil with his tusks. The thickening continued. Now Gundersen knew that he weighed several tons, and he tested his body’s coordination, striding back and forth, learning how to move on four limbs. He went to the spring and sucked up water in his trunk. He rubbed his leathery hide against trees. He trumpeted bellowing sounds of joy in his hugeness. He joined with Kurtz and Salamone in a wild dance, making the ground quiver. The nildoror too were transformed; one had become Kurtz, one had become Salamone, one had become Gundersen, and the three former beasts moved in wild pirouettes, tumbling and toppling in their unfamiliarity with human ways. But Gundersen lost interest in what the nildoror were doing. He concentrated solely on his own experience. Somewhere at the core of his soul it terrified him to know that this change had come over him and he was doomed forever to live as a massive animal of the jungle, shredding bark and ripping branches; yet it was rewarding to have shifted bodies this way and to have access to an entirely new range of sensory data. His eyesight now was dimmed, and everything that he saw was engulfed in a furry halo, but there were compensations: he was able to sort odors by their directions and by their textures, and his hearing was immensely more sensitive. It was the equivalent of being able to see into the ultraviolet and the infrared. A dingy forest flower sent dizzying waves of sleek moist sweetness at him; the click of insect-claws in underground tunnels was like a symphony for percussion. And the bigness of him! The ecstasy of carrying such a body! His transformed consciousness soared, swooped, rose high again. He trampled trees and praised himself for it in booming tones. He grazed and gorged. Then he sat for a while, perfectly still, and meditated on the existence of evil in the universe, asking himself why there should be such a thing, and indeed whether evil in fact existed as an objective phenomenon. His answers surprised and delighted him, and he turned to Kurtz to communicate his insights, but just then the effect of the venom began to fade with quite startling suddenness, and in a short while Gundersen felt altogether normal again. He was weeping, though, and he felt an anguish of shame, as though he had been flagrantly detected molesting a child. The three nildoror were nowhere in sight. Salamone picked up the bowl and went into the station. “Come,” Kurtz said. “Let’s go in too.”

They would not discuss any of it with him. They had let him share in it, but they would not explain a thing, cutting him off sternly when he asked. The rite was hermetically private. Gundersen was wholly unable to evaluate the experience. Had his body actually turned into that of a nildor for an hour? Hardly. Well, then, had his mind, his soul, somehow migrated into the nildor’s body? And had the nildor’s soul, if nildoror had souls, gone into his? What kind of sharing, what sort of union of innernesses, had occurred in that clearing?

Three days afterward, Gundersen applied for a transfer out of the serpent station. In those days he was easily upset by the unknown. Kurtz’s only reaction, when Gundersen announced he was leaving, was a short brutal chuckle. The normal tour of duty at the station was eight weeks, of which Gundersen had done less than half. He never again served a stint there.

Later, he gathered what gossip he could about the doings at the serpent station. He was told vague tales of sexual abominations in the grove, of couplings between Earthman and nildor, between Earthman and Earthman; he heard murmurs that those who habitually drank the venom underwent strange and terrible permanent changes of the body; he heard stories of how the nildoror elders in their private councils bitterly condemned the morbid practice of going to the serpent station to drink the stuff the Earthmen offered. But Gundersen did not know if any of these whispers were true. He found it difficult, in later years, to look Kurtz in the eye on the rare occasions when they met. Sometimes he found it difficult even to live with himself. In some peripheral way he had been tainted by his single hour of metamorphosis. He felt like a virgin who had stumbled into an orgy, and who had come away deflowered but yet ignorant of what had befallen her.

The phantoms faded. The sound of Kurtz’s guitar diminished and was gone.

Srin’gahar said, “Shall we leave now?”

Gundersen slowly emerged from the ruined station. “Does anyone gather the juices of the serpents today?”

“Not here,” said the nildor. He knelt. The Earthman mounted him, and in silence Srin’gahar carried him away, back to the path they had followed earlier.

IN EARLY AFTERNOON they neared the nildoror encampment that was Gundersen’s immediate goal. For most of the day they had been traveling across the broad coastal plain, but now the back of the land dipped sharply, for this far inland there was a long, narrow depression running from north to south, a deep rift between the central plateau and the coast. At the approach to this rift Gundersen saw the immense devastation of foliage that signaled the presence of a large nildoror herd within a few kilometers. A jagged scar ran through the forest from ground level to a point about twice a man’s height.

Even the lunatic tropical fertility of this region could not keep up with the nildoror appetite; it took a year or more for such zones of defoliation to restore themselves after the herd had moved on. Yet despite the impact of the herd, the forest on all sides of the scar was even more close-knit here than on the coastal plain to the east. This was a jungle raised to the next higher power, damp, steamy, dark. The temperature was considerably higher in the valley than at the coast, and though the atmosphere could not possibly have been any more humid here, there was an almost tangible wetness about the air. The vegetation was different, too. On the plain the trees tended to have sharp, sometimes dangerously sharp, leaves. Here the foliage was rounded and fleshy, heavy sagging disks of dark blue that glistened voluptuously whenever stray shafts of sunlight pierced the forest canopy overhead.

Gundersen and his mount continued to descend, following the line of the grazing scar. Now they made their way along the route of a stream that flowed perversely inland; the soil was spongy and soft, and more often than not Srin’gahar walked knee-deep in mud. They were entering a wide circular basin at what seemed to be the lowest point in the entire region. Streams flowed into it on three or four sides, feeding a dark weed-covered lake at the center; and around the margin of the lake was Srin’gahar’s herd. Gundersen saw several hundred nildoror grazing, sleeping, coupling, strolling.