The slug slid into place, securing the shutter; they let it go while the slug disappeared down the shaft, cable unwinding from a reel in the ceiling.

“Okay,” Dloan said, heading for the door.

They got back into the cool interior of the All-Terrain.

Miz grinned at Sharrow. “Done it?”

“Yes,” Sharrow said, wiping sweat from her face.

“Great,” Miz said, pulling on the car’s controls to take them away from the silo. They bumped off its domed top and back onto the track leading into the hills.

“Is that plane on the way yet?” Cenuij demanded from the rear of the bouncing All-Terrain.

“Pilot had a problem with customs in Hapley City,” Miz said.

“Sorted out now; meeting us two klicks north of here. She’ll be keeping low to stay out of surface radar; there’s a bit of fuss about the train.”

“What about satellites?” Cenuij said.

“By the time they process what they’ve got, we’ll be away,” Miz said. “Worst happens, the plane’s impounded.” He shrugged. “We’re leaving it at Chanasteria Field anyway.”

“Five seconds,” Dloan said. Miz stopped the All-Terrain on the track just before it entered a shallow canyon; they all watched the bulge of the waste silo.

There was an impression of noise; an almost sub-sonic concussion in the air and from the ground. A little dust drifted from the door of the blockhouse.

“That ought to slow the bastards down,” Miz said, restarting the vehicle.

Sharrow nodded. “With any luck.”

“I hope it was worth it,” Cenuij said.

“Well, yahoo for us,” Zefla yawned. “This calls for a drink.”

“Maybe Bencil Dornay’ll fix you a cocktail if you ask him nicely,” Miz told her, gunning the All-Terrain’s engine as they rumbled into the canyon.

Sharrow looked out of the window at the drifting dust.

She swam above the landscape. The water was a quiet milky-blue; the landscape below glowed green. Diving towards it, she could see tiny roads and houses, glittering lakes and patches of dark forest. She touched the cool crystal, her naked limbs pulsing, forcing, keeping her down; her black hair floated around her head, a slow cloud of darkness, swirling languidly.

She stilled her arms and legs and rose gently upward through the warm water.

On the surface she rolled over and lay floating, watching the vague shadow her body cast on the pale-pink tiles of the ceiling. She shifted her limbs this way and that, watching the fuzzy figure on the ceiling respond. Then she kicked out for the side, pulled herself out and took a towel from a table. She went to the parapet, where a breeze from the valley blew in, bringing a scent of late summer richness. The cool air flowed over the parapet and round her wet body, making her shiver. She put her arms on the wooden rail of the glass-fronted parapet and watched the hairs on her forearms unstick themselves from the beads of moisture there and rise, each on its own tiny mound of flesh.

The view led across the valley to evergreen forests and high summer pasture. The mountains above held no trace of snow yet, though further on, beyond the horizon, the centre of the range held peaks with permanent snow-fields and small glaciers. Beyond the lip of rock above, high streaks of clouds and vapour trails crossed the pale-blue vault like spindrift.

She put the towel round her shoulders and walked to the edge of the pool, looking down into the gradually calming, green-glowing waters. The landscape below trembled and shook, as though convulsing in the throes of some terrible quake.

The house of Bencil Dornay was built under an overhang on a great mountain in the Morspe range overlooking the Vernasayal valley, three-and-a-half thousand kilometres south of Yadayeypon, almost within sight of Jonolrey’s western coast and the rollers of Southern, Golter’s fourth ocean. The house clung beneath an undercut buttress like a particularly stubborn sea crustacean determined to stay clamped to its rock even though the tide had gone out long ago. The house’s most unsettling feature was its swimming pool, which was on the very lowest of the dwelling’s five floors, and which was glass-bottomed.

Faced with the green glow rising from the pool and the dim but otherwise unobstructed view it offered of the valley far below, people of a nervous disposition being shown round for the first time had been known to turn a remarkably similar shade. Hardier, more adventurous guests willing to display their trust in modern building techniques rarely missed an opportunity to take a dip in the pool, even if it was just to say they’d done it.

Sharrow stood there and waited for some time, until the water beading her skin had mostly dried and the chopping water in the pool had stilled completely, so that the view of the valley five hundred metres below was clear and distinct and heart-stopping, then she dived gracefully back in.

The pain came while she was swimming back to the side; just under her ribs, then in her legs. She tried to ignore it, swimming on, gritting her teeth. She got to the pool-side, put her hands on the ridged tiles, tensing her arms. Not again. It couldn’t happen again.

The pain slammed into her ears like a pair of white-hot swords; she heard herself gasp. She tried to clutch at the pool-side as the next wave hit, searing her from shoulders to calves. She cried out, falling back in the water, coughing and choking as she tried to swim and to curl up at the same time. Not all of it again. What came next? What did she have to prepare for now? The pain ebbed; she grabbed at the pool-side again. She was suddenly weak, unable to pull herself out; she felt to one side with her foot, seeking the steps. Her right hand found a handle recessed in the tiles. She gripped it, knowing what would happen now; her body convulsed as the agony tore through her, as if her body was a socket and the pain some huge, obscene plug, transmitting a vast and terrible current of agony.

She doubled up in the water, concentrating on her grip on the tile handle, terrified of letting go. She felt her face go underwater, and tried to hold her breath while the pain went on and on and a low moan escaped her lips in a string of bubbles. She wanted to breathe but she couldn’t uncurl herself from the fetal position she’d assumed. A roaring noise grew in her ears.

Then the pain eased, evaporating.

Spluttering, coughing, spitting water, she pulled on the tile handle and felt her head bump into the pool-side. She surfaced, breathing at last, and put out her other hand, found the handle, found both handles. One foot slotted into an underwater step. She kept her eyes closed and dragged herself upwards with the dregs of her strength. She felt the edge of the pool against her belly, and collapsed onto the warm plastic tiles at the edge of the pool, her legs still floating in the water.

Then strong hands were pulling her, lifting her, holding her, arms enfolding her. She opened her eyes long enough to see the worried faces of Zefla and Miz, and started to say something to them, to tell them not to worry, then the great sword smashed into her backside, and she spasmed, collapsing; they held her again, taking her weight, and she felt herself lifted, one toe sliding over the tiles, and then she was laid down on something soft, and they held her, warm against her, whispering to her, and were still there when the last brief instant of agony burst again inside her head, ending everything.

She woke to the sound of bird-song. She was still lying by the pool-side, covered by towels. Zefla lay beside her, cradling her head, gently rocking her. A bird chirped and she looked round for it.

“Sharrow?” Zefla said quietly.

The bluebird sat on the wooden parapet of the pool terrace. Sharrow watched it watching her, then turned to Zefla. “Hello,” she said. Her voice sounded small.