The drone moved swiftly, darting directly toward the metal cubeprotruding above the ice.

"Watch it," Josh said.

"Come back, damn you," Kirsty grated between her teeth as the drone settled onto the smooth top of the cube. She looked up at Josh, her eyes wide. "It's all right," she said. "There's no danger."

Josh felt a sense of relief. A great peace settled over him. "No," he said,

"there is no danger."

"We can get Ruth and David now," Sheba said.

For a moment Angela felt protest rising in her, but she, too, felt the great sense of peace and rightness. She smiled.

"Kirsty, send a drone down to the Fran Webster. Use the earth sampler scoop to gather up the two bodies. Seal them in a specimen bag."

"They'll be mixed together," Sheba said.

"They died together," Angela said.

"We can try to gather them in separately," Josh said.

Angela felt protest rising again, sensed that something was very wrong, tried to overcome the powerful sense of well-being that engulfed her. She moved toward the drone control panel, forcing each step. Her limbs were heavy. Her feet seemed to be anchored in thick, heavy mud. She lifted a control helmet.

"Better let Kirsty do it, Angel," Josh said. "She's more accustomed to the peculiarities of each drone."

"Yes, all right," Angela said.

Kirsty had switched away from the drone that rested atop the dark cube of metal on the other side of the world. She was directing one of the returning drones to reverse direction and go down to the surface again.

"I'll just monitor," Angela said, and her movements became more free.

She put out her hand and touched a switch and felt the control contact with the drone atop the cube. She braced herself and gave the order. Thedrone shifted position and on the screen a bright speck of fire appeared as it extended the nozzle of a molecular cutting torch and began to slice into the metal of the cube.

"Angela, what the hell—" Josh began. The rest of his question was cut off by a flare of light on the screen as the drone disintegrated.

Angela made one small sound as she toppled to the deck. Josh bent over her, removed the helmet. He cried out harshly, a painful, strained male scream. The beautiful emerald eyes had been exploded out of their sockets. Blood ran from her ears and her nose, and her skull, as he extended his hand and touched her, was soft. He withdrew his hand quickly and looked at his fingers. They were covered with blood and something else, a white paste. It was as if her brain had exploded inside her skull, shattering and pulping the bone, oozing out into her long, blonde hair.

Before either Kirsty or Sheba could react, Josh was at the console. He punched in a quick order, took weapons control, and within seconds a laser beam lanced downward, curved around the horizon. Kirsty, guessing what Josh intended, focused another viewer on the cube of metal on the far continent. She gasped as she saw that it was already almost hidden by ice.

The laser beam exploded on target. It was some time before the viewers could see through the resulting cloud of steam and fragments. When the view was clear, there was a large crater where the cube had been, and even as Josh and the others watched the ice began to melt and cover the crater with a swiftly forming lake of clear water.

Josh was searching out the next target. Once again the beam lanced down and there was another crater and an expanding area of melt as another cube was destroyed.

Kirsty put her arms around Josh and tried to pull his hands away from the console. "Captain," she said, "that's enough."

"They killed her," Josh said, his voice full of agony. "The bastards killed her."

"Captain, please," Kirsty begged, as another cube and the mass of ice surrounding it was vaporized. "You can't do this. You've got to stop it."

With great effort, Josh controlled his rage. He fell to his knees beside Angela. There was a great deal of blood on the deck.

CHAPTER ELEVEN

When the Watcher was alerted for the second time, the planet had made less than one orbit around its sun since the last trespass. A check of systems, the first priority from the day of the beginning, showed need for nourishment in distant ganglia. A healing flow of electrons swept outward to bring all extensions to full readiness within seconds.

The second intrusion was at the site of the first. Such exact positioning could not be accidental. The Watcher waited. Unlike the first one, the second intruder made no immediate attempt at penetration or exploration. There was time for a thorough study of the aliens and their craft. It only took a moment to determine that the occupants of the ship were the same as the first pair. The spaceship was more interesting. The propulsion system was of the same unknown type as that of the smaller ship. The drive, itself, was of simple construction, but it had taken a full concentration of reasoning power to determine that the plant utilized magnetic-radiative power, the energy of the stars. The small ship had been impressive. This second, large ship was even more advanced and required much study. A stream of observations flowed along lengthy ganglia and was stored.

The life-support systems of the two ships told the Watcher much about the physiology of the two life-forms even before a careful probe of thought patterns was initiated. The forces of creation had allowed prodigious latitude in the variety of life-forms but the basic mechanics of intelligent life were that the development of intelligence had not been confined to one planet more blessed than others, as it had once been believed. But then, the very existence of the Watcher and the necessity for eternal vigilance was conclusive testimony to the doctrine of parallel creation.

The intruders, like the first two, breathed oxygen and were carbon based. They were bipedal. In short, they were alien only by definition, not in construction or appearance.

The Watcher waited. Certain aspects of their science were disturbing.

The apparently easy discovery of the smaller ship by the newcomers raised questions. Tendrils of energy penetrated the ship's hull and began to search out a pathway through a more formidable barrier, the natural defense of the aliens' consciousness.

The first ship had been equipped with sophisticated subsurface exploration machinery. It was a mining vessel in search of ores. The function of the second ship was not so easily determined. It had complex communication equipment and carried weapons which, if properly applied, could do damage to sensory ganglia near the surface.

The question that most needed answering was how the large vessel so easily located the smaller one. The planet's ice hid more than one secret.

During the first few years of the Watcher's vigil more than one ship had strayed onto the ice, and a few had come deliberately. They had, of course, been silenced, and their repose had gone undisturbed, along with that of the Sleepers, across the millennia while the planet swam its path around the sun and the disc of the galaxy rotated ponderously. As the centuries slipped past, nothing puzzled the Watcher beyond a simple demand for silencing—and not even that for thousands of years—until the second intruder landed next to the icy tomb of the early trespassers.

How did the second alien ship locate the first so quickly and so precisely? The silencing of the first intruders had been quick and effective.

No call had gone out into space from the meddler's voice communications system.

It was possible that the larger ship contained metal detection equipment more effective than any known to the Watcher. The relatively tiny amount of metal in the first ship could not be easily sorted out from the mass of ore that lay under her, at least not by any method known to the Watcher. The Watcher consulted a vast store of information and confirmed the first belief that the smaller ship could not have communicated its whereabouts.