“Occasionally, however, larger variations have occurred. They appear to be due to a small original population or to unterrestroid conditions or both. The population may have been small because the planet could not support more, or have become small as the result of hostile action when the Empire fell. In the former case, genetic accidents had a chance to be significant; in the latter, radiation produced a high rate of mutant births among survivors. The variations are less apt to be in gross anatomy than in subtle endocrine and enzymatic qualities, which affect the physiology and psychology. Well known cases include the reaction of the Gwydiona to nicotine and certain indoles, and the requirement of the Ifrians for trace amounts of lead. Sometimes the inhabitants of two planets are actually intersterile because of their differences.
“While this world has hitherto received the sketchiest of examinations—” Evalyth was yanked out of a reverie into which the lecture had led her. “—certain facts are clear. Few terrestrial species have flourished; no doubt others were introduced originally, but died off after the technology to maintain them was lost. Man has thus been forced to depend on autochthonous life for the major part of his food. This life is deficient in various elements of human nutrition. For example, the only Vitamin C appears to be in immigrant plants; Saim observed that the people consume large amounts of grass and leaves from those species, and that fluoroscopic pictures indicate this practice has measurably modified the digestive tract. No one would supply skin, blood, sputum, or similar samples, not even from corpses.” Afraid of magic, Evalyth thought drearily, yes, they’re hack to that too. “But intensive analysis of the usual meat animals shows these to be under-supplied with three essential amino acids, and human adaptation to this must have involved considerable change on the cellular and sub-cellular levels. The probable type and extent of such change are computable.”
“The calculations are now complete.” As the computer resumed, Evalyth gripped the arms of her chair and could not breathe. “While the answer is subject to fair probability of success. In effect, Atheian flesh is alien here. It can be metabolized, but the body of the local consumer will excrete certain compounds, and these will import a characteristic odor to skin and breath as well as to urine and feces. The chance is good that it will be detectable by neo-Freeholder technique at distances of several kilometers, after sixty or seventy hours. But since the molecules in question are steadily being degraded and dissipated, speed of action is recommended.”
I am going to find Donli’s murderer. Darkness roared around Evalyth.
“Shall the organisms be ordered for you and given the appropriate search program?” asked the voice. “They can be on hand in an estimated three hours.”
“Yes,” she stammered. “Oh, please—Have you any other… other… advice?”
“The man ought not to be killed out of hand, but brought here for examination, if for no other reason, that in order that the scientific ends of the expedition may be served.”
That’s a machine talking, Evalyth cried. It’s designed to help research. Nothing more. But it was his. And its answer was so altogether Donli that she could no longer hold back her tears.
The single big moon rose nearly full, shortly after sundown. It drowned most stars; the jungle beneath was cobbled with silver and dappled with black; the snowcone of Mount Bums floated unreal at the unseen edge of the world. Wind slid around Evalyth where she crouched on her gravsled; it was full of wet acrid odors, and felt cold though it was not, and chuckled at her back. Somewhere something screeched, every few minutes, and something else cawed reply.
She scowled at her position indicators, aglow on the control panel. Curses and chaos, Moru had to be in this area! He could not have escaped from the valley on foot in the time available, and her search pattern had practically covered it. If she ran out of bugs before she found him, must she assume he was dead? They ought to be able to find his body regardless, ought they not? Unless it was buried deep. Here. She brought the sled to hover, took the next phial off the rack, and stood up to open it.
The bugs came out many and tiny, like smoke in the moonlight. Another failure?
No! Wait! Were not those motes dancing back together, into a streak barely visible under the moon, and vanishing downward? Heart thuttering, she turned to the indicator. Its neurodetector antenna was not aimlessly wobbling, but pointed straight west-northwest, declination thirty-two degrees below horizontal. Only a concentration of the bugs could make it behave like that. And only the particular mixture of molecules to which the bugs had been presensitized, in several parts per million or better, would make them converge on the source.
“Ya-a-ah!” She couldn’t help the one hawk-yell. But thereafter she bit her lips shut—blood trickled unnoticed down her chin—and drove the sled in silence.
The distance was a mere few kilometers. She came to a halt above an opening in the forest. Pools of scummy water gleamed in its rank growth. The trees made a solid-seeming wall around. Evalyth clapped her night goggles down off her helmet and over her eyes. A lean-to became visible. It was hastily woven from vines and withes, huddled against a pair of the largest trees to let their branches hide it from the sky. The bugs were entering.
Evalyth lowered her sled to a meter off the ground and got to her feet again. A stun pistol slid from its sheath into her right hand. Her left rested on the blaster.
Mom’s two sons groped from the shelter. The bugs whirled around them, a mist that blurred their outlines. Of course, Evalyth realized, nonetheless shocked into a higher hatred. I should have known they did the actual devouring. More than ever did they resemble gnomes-skinny limbs, big heads, the pot bellies of undernourishment. Krakener boys of their age would have twice their bulk and be noticeably on the way to becoming men. These nude bodies belonged to children, except that they had the grotesqueness of eld.
The parents followed them, ignored by the entranced bugs. The mother wailed. Evalyth identified a few words. “What is the matter, what are those things—oh, help—” But her gaze was locked upon Moru.
Limping out of the hutch, stooped to clear its entrance, he made her think of some huge beetle crawling from an offal heap. But she would know that bushy head though her brain were coming apart. He carried a stone blade, surely the one that had hacked up Donli. I will take it away from him, and the hand with it, Evalyth wept. I will keep him alive while 1 dismantle him with these my own hands, and in between times he can watch me flay his repulsive spawn.
The wife’s scream broke through. She had seen the metal thing, and the giant that stood on its platform, with skull and eyes shimmering beneath the moon.
“I have come for you who killed my man,” Evalyth said.
The mother screamed anew and cast herself before the boys. The father tried to run around in front of her, but his lame foot twisted under him, and he fell into a pool. As he struggled out of its muck, Evalyth shot the woman. No sound was heard; she folded and lay moveless. “Run!” Moru shouted. He tried to charge the sled. Evalyth twisted a control stick. Her vehicle whipped in a circle, heading off the boys. She shot them from above, where Moru couldn’t quite reach her.
He knelt beside the nearest, took the body in his arms and looked upward. The moonlight poured relentlessly across him. “What can you now do to me?” he called.
She stunned him too, landed, got off and quickly hogtied the four of them. Loading them aboard, she found them lighter than she had expected.