He tried it, found that his shoes would not go into the mesh, kicked them off and tried again.

"Don't!" said a voice behind him.

Don looked back. A major of the Ground Forces, cap missing and one sleeve torn and bloody, stood behind him. "Don't try it," the major said reasonably. "It will kill you quickly. I know; I supervised its installation."

Don dropped to the ground. "Isn't there some way to switch it off?"

"Certainly-outside." The officer grinned wryly. "I took care of that. A locked switch in the guardhouse-and another at the main distribution board in the city. Nowhere else." He coughed. "Pardon me-the smoke."

Don looked toward the burning city. "The distribution board back in the powerhouse," he said softly. "I wonder--"

"Eh?" The major followed his glance. "I don't know-I couldn't say. The powerhouse is fireproof."

A voice behind them in the mist shouted, "Harvey! Donald J. Harvey! Front and center!"

Don swarmed up the fence.

He hesitated just before touching the lowest of the three strands, flipped it with the back of his hand. Nothing happened-then he was over and falling. He hit badly, hurting a wrist, but scrambled to his feet and ran.

There were shouts behind him; without stopping he risked a look over his shoulder. Someone else was at the top of the fence. Even as he looked he heard the hiss of a beam. The figure jerked and contracted, like a fly touched by flame.

The figure raised its head. Don heard the major's voice in a clear triumphant baritone: "Venus and Freedom!" He fell back inside the fence.

Dory plunged ahead, not knowing where he was going, not caring as long as it was away. Again he heard the angry, deadly hissing; he cut to the left and ran faster, then cut back again beyond a clump of witch's brooms. He pounded ahead, giving it all he had, with his breath like dry steam in his throat-then skidded to a stop at water's edge.

He stood still for a moment, looked and listened. Nothing to see but grey mist, nothing to hear but the throbbing of his own heart. No, not quite nothing-someone shouted in the distance and he heard the sounds of booted feet crashing through the brush. It seemed to come from the right; he turned left and trotted along the waterfront, his eyes open for a gondola, a skiff, anything that would float.

The bank curled back to the left; he followed it, then stopped as he realized that it was leading him to the narrow neck of land that joined Main Island to East Spit. It was a cinch, he thought, that there would be a guard at the bottleneck; it seemed to him that there had been one there when he and the other dispossessed had been herded across it to the prison camp.

He listened-yes, they were still behind him-and flanking him. There was nothing in front of him but the bank curving back to certain capture.

For a moment his face was contorted in an agony of frustration, then his features suddenly relaxed to serenity and he stepped firmly into the water and walked away from the land.

Don could swim, in which respect he differed from most Venus colonials. On Venus no one ever swims; there is no water fit to swim in. Venus has no moon to pile up tides; the solar tide disturbs her waters but little. The waters never freeze, never approach the critical 4° C. which causes terrestrial lakes and streams and ponds to turn over and "ventilate." The planet is almost free of weather in the boisterous sense. Her waters lie placid on their surface-and accumulate vileness underneath, by the year, by the generation, by the eon.

Don walked straight out, trying not to think of the black and sulphurous muck he was treading in. The water was shallow; fifty yards out with the shore line dim behind him, he was still in only up to his knees. He glanced back and decided to go out farther; if he could not see the shore, then they could not see him. He reminded himself that he would have to keep his wits about him not to get turned around.

Presently the bottom suddenly dropped away a foot or more; he stepped off the edge; lost his balance and thrashed around; recovered himself and scrambled back up on the ledge, congratulating himself that he had not gotten his face and eyes into the stuff.

He heard a shout and almost at once the sound of water striking a hot stove, enormously amplified. Ten feet away from him a cloud of steam lifted from the water's surface, climbed lazily into the mist. He cringed and wanted to dodge, but there was no way to dodge. The shouting resumed and the sounds carried clearly across the water muffled by the fog but still plain: "Over here! Over here! He's taken to the water."

Much more distantly he heard the answer: "Coming!"

Most cautiously Don moved forward, felt the edge of the drop off, tried it and found that he could still stand beyond it, almost up to his armpits but still wading. He was moving, forward slowly, trying to avoid noise and minding his precarious, half-floating balance, when he heard the sibilant sound of the beam.

The soldier back on the bank had imagination; instead of firing again at random into the drifting mist he was fanning the flat surface of the water, doing his best to keep his beam horizontal and playing it like a hose. Don squatted down until his face alone was out of the water.

The beam passed only inches over his head; he could hear it pass, smell the ozone.

The hissing stopped abruptly to be followed by the age-old, monotonous cursing of the barrackroom. "But, sergeant-" someone protested.

"I'll `sergeant' you! Alive-do you hear? You heard the orders. If you've killed him, I'll take you apart with a rusty knife. No, I won't; I'll turn you over to Mr. Bankfield. You hopeless fool!"

"But, sergeant, he was escaping by water; I had to stop him."

" `But sergeant!' `But sergeant!'-is that all you can say! Get a boat! Get a snooper! Get a two-station portable bounce

rig. Call base and find out if they've got a copter down."

"Where would I get a boat?"

"Get one! He can't get away. We'll find him-or his body. If it's his body, you'd better cut your throat."

Don listened, then moved silently forward-or away from the direction the voices seemed to come from. He could no longer tell true direction; there was nothing but the black surface of water and a horizon of mist. For some distance the bottom continued fairly level, then he realized that it was again dropping away. He was forced to stop, able to wade no further.

He thought it over, trying to avoid panic. He was still close to Main Island with nothing but mist between himself and the shore. It was a certainty that with proper search gear-infra-red or any of the appropriate offspring of radar-they could pin him like a beetle to cork. It was merely a matter of waiting for the gear to be brought up.

Should he surrender now and get out of this poisonous swill? Surrender and go back and tell Bankfield to find Isobel Costello if he wanted the ring? He let himself sink forward and struck out strongly, swimming breast stroke to try to keep his face out of the water.

Breast stroke was far from being his strongest stroke and it was made worse by trying so hard to keep his face dry. His neck began to ache presently the ache spread through his shoulder muscles and into his back. Indefinite time and endless gallons later he ached everywhere, even to his eyeballs-yet for all he could tell about it he might have been swimming in a bathtub, one whose walls were grey mist. It did not seem possible that, in the archipelago which made up Buchanan Province, one could swim so far without running into something... a sand spit, a mud bar.