Pid wanted to say something to his crew, but wasn't sure how to put it The crew waited. Ilg the Radioman had sent the final message to the Glom planet. Ger the Detector read sixteen dials at once, and reported, "No sign of alien activity." His body surfaces flowed carelessly.

Pid noticed the flow, and knew what he had to say. Ever since they had left Glom, shape-discipline had been disgustingly lax. The Invasion Chief had warned him; but still, he had to do something about it. It was his duty, since lower castes such as Radiomen and Detectors were notoriously p.r.o.ne to Shapelessness.

"A lot of hopes are resting on this expedition," he began slowly. "We're a long way from home now."

Ger the Detector nodded. Ilg the Radioman flowed out of his prescribed shape and molded himself comfortably to a wall.

"However," Pid said sternly, "distance is no excuse for promiscuous shapelessness."

Ilg flowed hastily back into proper Radioman's shape.

"Exotic shapes will undoubtedly be called for," Pid went on. "And for that we have a special dispensation. But remember-any shape not a.s.sumed strictly in the line of duty is a device of The Shapeless One!"

Ger's body surfaces abruptly stopped flowing.

"That's all," Pid said, and flowed into his controls. The ship started down, so smoothly coordinated that Pid felt a glow of pride.

They were good workers, he decided. He just couldn't expect them to be as shape-conscious as a high-caste Pilot. Even the Invasion Chief had told him that.

"Pid," the Invasion Chief had said at their last interview, "we need this planet desperately."

"Yes sir," Pid had said, standing at full attention, never quivering from Optimum Pilot's Shape.

"One of you," the Chief said heavily, "must get through and set up a Displacer near an atomic power source. The army will be standing by at this end, ready to step through."

"We'll do it, Sir," Pid said.

"This expedition has to succeed," the Chief said, and his features blurred momentarily from sheer fatigue. "In strictest confidence, there's considerable unrest on Glom. The miner caste is on strike, for instance. They want a new digging shape. Say the old one is inefficient."

Pid looked properly indignant. The Mining Shape had been set down by the ancients fifty thousand years ago, together with the rest of the basic shapes. And now these upstarts wanted to change it!

"That's not all," the Chief told him. "We've uncovered a new Cult of Shapelessness. Picked up almost eight thousand Glom, and I don't know how many more we missed."

Pid knew that Shapelessness was a lure of The Shapeless One, the greatest evil that the Glom mind conceived of. But how, he wondered, did Glom fall for His lures?

The Chief guessed his question. "Pid," he said, "I suppose it's difficult for you to understand. Do you enjoy Piloting?"

"Yes sir," Pid said simply. Enjoy Piloting! It was his entire life! Without a ship, he was nothing.

"Not all Glom feel that way," the Chief said. "I don't understand it either. All my ancestors have been Invasion Chiefs, back to the beginning of time. So of course I want to be an Invasion Chief. It's only natural, as well as lawful. But the lower castes don't feel that way." He shook his body sadly.

"I've told you this for a reason," the Chief went on. "We Glom need more room. This unrest is caused purely by crowding. All our psychologists say so. Another planet to expand into will cure everything. So we're counting on you, Pid."

"Yes sir," Pid said, with a glow of pride.

The Chief rose to end the interview. Then he changed his mind and sat down again.

"You'll have to watch your crew," he said. "They're loyal, no doubt, but low-caste. And you know the lower castes."

Pid did indeed.

"Ger, your Detector, is suspected of harboring Alterationist tendencies. He was once fined for a.s.suming a quasi-Hunter shape. Ilg has never had any definite charge brought against him. But I hear that he remains immobile for suspiciously long periods of time. Possibly, he fancies himself a Thinker."

"But sir," Pid protested, "if they are even slightly tainted with Alterationism or Shapelessness, why send them on this expedition?"

The Chief hesitated before answering. "There are plenty of Glom I could trust," he said slowly. "But those two have certain qualities of resourcefulness and imagination that will be needed on this expedition." He sighed. "I really don't understand why those qualities are usually linked with Shapelessness."

"Yes sir," Pid said.

"Just watch them."

"Yes sir," Pid said again, and saluted, realizing that the interview was at an end In his body pouch he felt the dormant Displacer, ready to transform the enemy's power source into a bridge across s.p.a.ce for the Glom hordes.

"Good luck," the Chief said. "I'm sure you'll need it."

The ship dropped silently towards the surface of the enemy planet. Ger the Detector a.n.a.lyzed the clouds below, and fed data into the Camouflage Unit. The Unit went to work. Soon the ship looked, to all outward appearances, like a cirrus formation.

Pid allowed the ship to drift slowly toward the surface of the mystery planet. He was in Optimum Pilot's Shape now, the most efficient of the four shapes allotted to the Pilot Caste. Blind, deaf, and dumb, an extension of his controls, all his attention was directed toward matching the velocities of the high-flying clouds, staying among them, becoming a part of them.

Ger remained rigidly in one of the two shapes allotted to Detectors. He fed data into the Camouflage Unit, and the descending ship slowly altered into an alto-c.u.mulus.

There was no sign of activity from the enemy planet.

Ilg located an atomic power source, and fed the data to Pid. The Pilot altered course. He had reached the lowest level of clouds, barely a mile above the surface of the planet. Now his ship looked like a fat, fleecy c.u.mulus.

And still there was no sign of alarm. The unknown fate that had overtaken twenty previous expeditions still had not showed itself.

Dusk crept across the face of the planet as Pid maneuvered near the atomic power installation. He avoided the surrounding homes and hovered over a clump of woods.

Darkness fell, and the green planet's lone moon was veiled in clouds.

One cloud floated lower.

And landed.

"Quick, everyone out!" Pid shouted, detaching himself from the ship's controls. He a.s.sumed the Pilot's Shape best suited for running, and raced out of the hatch. Ger and Ilg hurried after him. They stopped fifty yards from the ship, and waited.

Inside the ship a circuit closed. There was a silent shudder, and the ship began to melt. Plastic dissolved, metal crumpled. Soon the ship was a great pile of junk, and still the process went on. Big fragments broke into smaller fragments, and split, and split again.

Pid felt suddenly helpless, watching his ship scuttle itself. He was a Pilot, of the Pilot Caste. His father had been a Pilot, and his father before him, stretching back to the hazy past when the Glom had first constructed ships. He had spent his entire childhood around ships, his entire manhood flying them.

Now, shipless, he was naked in an alien world.

In a few minutes there was only a mound of dust to show where the ship had been. The night wind scattered it through the forest. And then there was nothing at all.

They waited. Nothing happened. The wind sighed and the trees creaked. Squirrels chirped, and birds stirred in their nests.

An acorn fell to the ground.

Pid heaved a sigh of relief and sat down. The twenty-first Glom expedition had landed safely.

There was nothing to be done until morning, so Pid began to make plans. They had landed as close to the atomic power installation as they dared. Now they would have to get closer. Somehow, one of them had to get very near the reactor room, in order to activate the Displacer.

Difficult. But Pid felt certain of success. After all, the Glom were strong on ingenuity.

Strong on ingenuity, he thought bitterly, but terribly short of radioactives. That was another reason why this expedition was so important There was little radioactive fuel left, on any of the Glom worlds..

Ages ago, the Glom had spent their store of radioactives spreading throughout their neighboring worlds, occupying the ones that they could live on. Colonization barely kept up with the mounting birthrate. New worlds were constantly needed.

This particular world, discovered in a scouting expedition, was needed It suited the Glom perfectly. But it was too far away. They didn't have enough fuel to mount a conquering s.p.a.ce fleet.

Luckily, there was another way. A better way.

Over the centuries, the Glom scientists had developed the Displacer. A triumph of Ident.i.ty Engineering, the Displacer allowed ma.s.s to be moved instantaneously between any two linked points.

One end was set up at Glom's sole atomic energy plant The other end had to be placed in proximity to another atomic power source, and activated. Diverted power then flowed through both ends, was modified, and modified again.

Then, through the miracle of Ident.i.ty Engineering, the Glom could step through from planet to planet; or pour through in a great, overwhelming wave.

It was quite simple. But twenty expeditions had failed to set up the Earth-end Displacer.

What had happened to them was not known.

For no Glom ship had ever returned to tell.

Before dawn they crept through the woods, taking on the coloration of the plants around them. Their Displacers pulsed feebly, sensing the nearness of atomic energy.

A tiny, four-legged creature darted in front of them. Instantly, Ger grew four legs and a long, streamlined body and gave chase.

"Ger! Come back here!" Pid howled at the Detector, throwing caution to the winds.

Ger overtook the animal and knocked it down. He tried to bite it but he had neglected to grow teeth. The animal jumped free, and vanished into the underbrush. Ger thrust out a set of teeth and bunched his muscles for a leap.

"Ger!"

Reluctantly, the Detector turned away. He loped silently back to Pid.

"I was hungry," he said.

"You were not," Pid said sternly.

"Was," Ger mumbled, writhing with embarra.s.sment Pid remembered what the Chief had told him. Ger certainly did have Hunter tendencies. He would have to watch him more closely.

"We'll have no more of that," Pid said. "Remember-the lure of Exotic Shapes is not sanctioned. Be content with the shape you were born to."

Ger nodded, and melted back into the underbrush. They moved on.

At the extreme edge of the woods they could observe the atomic energy installation. Pid disguised himself as a clump of shrubbery and Ger formed himself into an old log. Ilg, after a moment's thought, became a young oak.

The installation was in the form of a long, low building, surrounded by a metal fence. There was a gate, and guards in front of it.

The first job, Pid thought, was to get past that gate. He began to consider ways and means.

From the fragmentary reports of the survey parties, Pid knew that, in some ways, this race of Men were like the Glom. They had pets, as the Glom did, and homes and children, and a culture. The inhabitants were skilled mechanically, as were the Glom.

But there were terrific differences. The Men were of fixed and immutable forms, like stones or trees. And to compensate, their planet boasted a fantastic array of species, types and kinds. This was completely unlike Glom, which had only eight distinct forms of animal life.

And evidently, the Men were skilled at detecting invaders, Pid thought. He wished he knew how the other expeditions had failed. It would make his job much easier.

A Man lurched past them on two incredibly stiff legs. Rigidity was evident in his every move. Without looking, he hurried past.

"I know," Ger said, after the creature had moved away. "I'll disguise myself as a Man, walk through the gate to the reactor room, and activate my Displacer."

"You can't speak their language," Pid pointed out.

"I won't speak at all. I'll ignore them. Look." Quickly Ger shaped himself into a Man.

"That's not bad," Pid said.

Ger tried a few practice steps, copying the b.u.mpy walk of the Man.

"But I'm afraid it won't work," Pid said.

"It's perfectly logical," Ger pointed out.

"I know. Therefore the other expeditions must have tried it. And none of them came back."

There was no arguing that. Ger flowed back into the shape of a log. "What, then?" he asked.

"Let me think," Pid said.

Another creature lurched past, on four legs instead of two. Pid recognized it as a Dog, a pet of Man. He watched it carefully.

The Dog ambled to the gate, head down, in no particular hurry. It walked through, unchallenged, and lay down in the gra.s.s.

"Hmm," Pid said.

They watched. One of the Men walked past, and touched the Dog on the head. The Dog stuck out its tongue, and rolled over on its side.

"I can do that," Ger said excitedly. He started to flow into the shape of a Dog.

"No, wait," Pid said. "We'll spend the rest of the day thinking it over. This is too important to rush into."

Ger subsided sulkily.

"Come on, let's move back," Pid said. He and Ger started into the woods. Then he remembered Ilg.

"Ilg?" he called softly.