"I would prefer to kill the vermin," said Karazan. "In with you. " He thrust Hozman into the car. Etzwane studied the door and discovered the inside clamp. He asked Hozman, "What now? Do I pull the door closed and throw down this lever?"

"That is all," came Hozman's sullen reply. The car will leave Durdane of its own volition."

Then make ready; we are about to leave."

Etzwane closed the door. At once the floor thrust into their feet. The Alula gasped, Hozman whimpered.

There was a period of acceleration, then ease. The blue illumination made faces unrecognizable and seemed to deduce a new dimension of each man's soul. Etzwane, looking on the Alula, felt humble in the face of their bravery; unlike himself, they knew nothing of Ifness' abilities. Then Etzwane asked of Hozman: "What is this knowledge by which you will save our lives?"

"It is nothing definite," said Hozman. "It concerns your general demeanor and how you must act to avoid instant detection."

"Well, then, how must we act?"

"You must walk like this, with your arms limp, your eyes blank and mild, your legs loose, as if they barely supported the weight of your bodies. " Hozman stood limp and futile, with long, hopeless creases pinching his face.

Fifteen minutes the speed held, then slackened. Hozman said nervously, "I know nothing of conditions aboard-but you must strike hard and fast, and make the most of surprise."

"The asutra ride their hosts?"

"I imagine that they do."

"For your own sake," said Etzwane, "fight and fight well."

Hozman made no response. A moment passed. The car touched a solid object and slid into a socket, with a small shock of finality. The men tensed themselves. The door opened. They looked into an empty corridor, along which men might walk single file. A voice came from a panel: "Step forth into the hall; remove all clothing; you will be cleansed by a refreshing spray."

"Act as if you are too drugged to understand the instruction," muttered Hozman. Etzwane moved slowly out into the corridor and languidly walked to the far end, where a door barred the way. The Alula followed, Hozman shambling in their midst. The voice spoke again, "Remove all clothes; they must be removed.''

Etzwane made tentative motions to obey, then let his arms sag, as if fatigued, and sagged against the wall. From the speaker came a faint hiss and a disgusted mutter. From ceiling orifices jets of an acrid liquid struck down, drenching them to the skin… The jets were cut off; the end door opened. Etzwane staggered through into a large circular chamber. Here waited half a dozen biped creatures, gray and lumpy of skin, squat in stature, batrachian in aspect. Five eyes like orbs of milk-glass protruded from the squat heads; the feet were flaps of gray-green muscle. On the nape of each neck rested an asutra. Etzwane had no need to call a signal. Pent energy exploded within the Alula; they lurched forward; in five seconds the gray host-things lay dead in spouts of gray-green blood, with the asutra crushed and hacked. Etzwane glared around the room, nostrils dilated, the energy gun in readiness. But no new gray creatures appeared. He ran on long, stealthy steps to the end of the chamber, where narrow corridors led in two directions. He listened and heard no sound save a low pulsing hum. Half the Alula set off with Karazan to the left; Etzwane led the others to the right. The corridors, narrow and low, had been built to asutra concepts of scale; Etzwane wondered how Karazan fared. He came to a narrow ramp; at the top he saw the gleam of stars. Up he clambered at his best speed and burst out into a control dome. A low bench circled the room; at one area a dozen small tanks displayed quantities of colored liquids. One end of the chamber was given to a low console, with adjuncts which Etzwane assumed to be controls. On the padded bench beside the controls rested three asutra. At Etzwane's entry, they shrank back against the transparent dome, hissing in shock. One produced a small black mechanism which spat lavender fire toward Etzwane. He had already flung himself aside; the fire struck into the Alula at his back. Etzwane could not use his energy gun for fear of rupturing the dome; he lunged, jerking and ducking across the room. One of the asutra scuttled into a small passageway, no more than a foot square; Etzwane smashed the second creature with the flat of his blade. The third sidled, hissing and whistling, to the bank of controls. Etzwane seized it and threw it into the center of the room, where the Alula stamped it to pulp.

The man who had been struck by the bolt lay staring up through the low dome at the stars; he was dying and nothing could be done for him. Etzwane ordered two men to remain on guard; they gave him truculent stares, challenging his authority. Etzwane ignored their recalcitrance. 'Take care; do not stand where an asutra can aim at you from that little passage yonder. Block off the opening if you can. Be alert! " He departed the room and went off after Karazan.

A ramp led down to a central hold, and here lay the captives from Caraz, drugged and torpid, on shelves which radiated from the walls like the spokes of a wheel. Karazan had killed one of the lumpish gray attendants; two more stood submissively to the side. None of the three carried asutras. In all, two hundred men, women, and children lay stacked like billets of timber and among them Karazan stood in the center of the room, scowling uncertainly from the gray host-creatures to the captives, at a loss, perhaps for the first time in his life.

"These people are well enough as they are," Etzwane told Karazan. "Let them sleep. Another matter is more urgent. The asutra have small passages where at least one has taken refuge. We must search the ship, taking great precautions, for the creatures carry energy weapons; already they have killed one man. Our best advantage is to block off the passages as we come to them, until we learn the plan of the ship."

Karazan said, "It is smaller than I had expected; not a comfortable or easy place to be."

"The asutra have built as close to their own scale as possible. With luck we shall soon be back down on the surface. Until then we can only wait and hope that the asutra can't call for help."

Karazan blinked. "How could they do that?"

"The advanced races talk through empty space, using the power of lightning."

"Preposterous," muttered Karazan, looking around the chamber. "Why, in the first place, should they go to such lengths for slaves? They have the toad-things, the black monsters like your captive, the red demons, arid who knows how many other servants?"

"Nothing about the asutra is certain," said Etzwane. "One guess is as good as another. Perhaps each of their hosts serves a special function. Perhaps they simply enjoy a variety of hosts."

"No matter," growled Karazan, "we must dig them out of their crannies. " He called instructions to his men and sent them off in pairs. Declaring himself too cumbersome to aid in the search, he took the gray creatures to the observation dome and tried to persuade them to take the ship down to Durdane, without success. Etzwane went off to examine the lift car, still in its socket, and could discover no means to control it. He next searched for food and water, which he found in bins and tanks under the slave hold. The atmosphere seemed fresh; somewhere aboard the ship an automatic renewal system was at work, and Etzwane hoped that if asutra were alive and in hiding they would not think to stifle the intruders. What, in a similar position, would he do himself? If a transfer ship were due from the home-world, he would do nothing, but allow the problem to be solved by exterior means… Two by two the Alula warriors came to report. They had discovered the drive system, the energy generators, the air-purification system. They had surprised and killed one asutra riding the neck of his gray host, but had encountered no others; in a dozen areas they had blocked off asutra passages. Etzwane, now with nothing better to do, made a slow exploration of the ship, trying to learn the location of the asutra refuge. In this work he was assisted by the Alula, who had gained a measure of confidence.