He tried, as he ran in something like a trance, as his breath streamed back and forth through his wide-open mouth, to imagine how close they had been to the bows, for how long that immense weight of ship behind would be able to compress its front section as its billion-tonne mass rammed into what must — if it had filled the cloud bank they had seen earlier — be a massive tabular iceberg.

As though in a dream, Horza could see the ship about him, still wrapped in clouds and mist but lit from above by the wash of golden sunlight. The towers and spires seemed unaffected, the whole vast structure still sliding forward towards the ice as the kilometres of Megaship behind them pressed forward with the vessel's own titanic momentum. He ran by game courts, past tents of billowing silver, through a pile of musical instruments. Ahead there was a huge tiered wall of more decks, and above him were bridges, swaying and thrashing as their bow-ward supports, out of sight behind him, came closer to the advancing wave of wreckage and were consumed. He saw the deck to one side drop away into airy, hazy nothing. The deck under his feet started to rise, slowly, but for fifteen metres or more in front of him; he was fighting his way up a slope growing steeper all the time. A suspension bridge to his left collapsed, wires flailing; it disappeared into the golden mist, the noise of its fall lost in the crushing din assaulting his ears. His feet started to slide on the tilt of deck. He fell, landed heavily on his back and turned, looking behind him.

Against a wall of pure white towering higher than the Olmedreca's tallest spire, the Megaship was throwing itself to destruction in a froth of debris and ice. It was like the biggest wave in the universe, rendered in scrap metal, sculpted in grinding junk; and beyond and about it, over and through, cascades of flashing, glittering ice and snow swept down in great slow veils from the cliff of frozen water beyond. Horza stared at it, then started to slide down towards it as the deck tilted him. To his left a huge tower was collapsing slowly, bowing to the breaking wave of compacted wreckage like a slave before a master. Horza felt a scream start in his throat as he saw decks and railings, walls and bulkheads and frames he had only just run past start to crumple and smash and come towards him.

He rolled over sliding shards and skidding fragments to the buckling rail at the edge of the deck, grabbed at the rails, caught them, heaved with both arms, kicked with one foot, and threw himself over the side.

He fell only one deck, crashing into sloped metal, winding himself. He got to his feet as fast as he could, sucking air through his mouth and swallowing as he tried to get his lungs to work. The narrow deck he was on was also buckling, but the fold-point was between him and the wall of towering, grinding wreckage; he slipped and slid away from it down the sloping surface as the deck behind him rose into a peak. Metal tore, and girders crashed out of the deck above like broken bones through skin. A set of steps faced him, leading to the deck he'd just jumped from, but to an area that was still level. He scrambled up to the level deck, which only then started to tip, canting away from the wave front of debris as its front edge lifted, crumpling.

He ran down the increasing slope, water from shallow ornamental pools cascading around him. More steps: he hauled himself towards the next deck.

His chest and throat seemed filled with hot coals, his legs with molten lead, and all the time that awful, nightmarish pull came from behind, dragging him back towards the wreckage. He stumbled and gasped his way from the top of the steps past the side of a broken, drained swimming pool.

"Horza!" a voice yelled. "Is that you? Horza! It's Mipp! Look up!"

Horza lifted his head. In the mist, thirty metres above him, was the CAT's shuttle. He waved weakly at it, staggering as he did so. The shuttle lowered itself through the mist ahead of him, its rear doors opening, until it was hovering just over the next deck above.

"I've opened the doors! Jump in!" Mipp shouted. Horza tried to reply, but could produce no sound apart from a sort of rasping wheeze; he staggered on, feeling as though the bones in his legs had turned to jelly. The heavy suit bumped and crashed around him, his feet slipped on the broken glass which covered the thrumming deck under his boots. Yet more steps towered ahead, leading to the deck where the shuttle waited. "Hurry up, Horza! I can't wait much longer!"

He threw himself at the steps, hauled himself up. The shuttle wavered in the air, swivelling, its open rear ramp pointing at him, then away. The steps beneath him shuddered; the noise around him roared, full of screams and crashes. Another voice was shouting in his ears but he couldn't make out the words. He fell onto the upper deck, lunged forward for the shuttle ramp a few metres away; he could see the seats and lights inside, Lenipobra's suited body slumped in one corner.

"I can't wait! I've-" Mipp shouted above the scream of the wreckage and the other shouting voice. The shuttle started to rise. Horza threw himself at it.

His hands caught the lip of the ramp just as it rose level with his chest. He was hoisted from the deck, swinging under outstretched arms and looking forward under the shuttle's fuselage belly as the craft forced its way up into the air.

"Horza! Horza! I'm sorry," Mipp sobbed.

"You've got me!" Horza yelled hoarsely.

"What?"

The shuttle was still climbing, passing decks and towers and the thin horizontal lines of monorail tracks. All Horza's weight was taken by his fingers, hooked in their gloves over the edge of the ramp door. His arms ached. "I'm hanging onto the goddamn ramp!"

"You bastards!" screamed another voice. It was Lamm. The ramp started to close; the jerk almost broke Horza's grip. They were fifty metres up and climbing. He saw the top part of the doors jawing down towards his fingers.

"Mipp!" he yelled. "Don't close the door! Leave the ramp where it is and I'll try to get in!"

"OK," Mipp said quickly. The ramp stopped angling up, halting at about twenty degrees. Horza began swinging his legs from side to side. They were seventy, eighty metres up, facing away from the wave of wreckage and heading slowly away from it.

"You black bastard! Come back!" Lamm bellowed.

"I can't, Lamm!" Mipp cried. "I can't! You're too close!"

"You fat bastard!" Lamm hissed.

Light flickered around Horza. The underside of the shuttle blazed in a dozen places as laser fire hit it. Something slammed into Horza's left foot, on the sole of his boot, and his right leg was kicked out as his leg burned with pain.

Mipp screamed incoherently. The shuttle started to gather speed, heading back over the Megaship and diagonally across it. The air roared around Horza's body, slowly tearing his grip away. "Mipp, slow down!" he shouted.

"Bastard!" Lamm yelled again. The mist to one side glowed as a fan of short-lived beams incandesced within it, then the laser fire shifted and the shuttle sparkled again, cracking with five or six small explosions around the front and nose section. Mipp howled. The shuttle increased speed. Horza was still trying to swing one leg onto the sloped ramp, but the clawed fingers of his gloves were slowly scraping along the roughened surface as his body was slipstreamed back behind the speeding craft.

Lamm screamed — a high, gurgling sound which went through Horza's head like an electric shock, until the noise snapped off suddenly, replaced for an instant by sharp cracking, breaking noises.

The shuttle raced over the surface of the crashing Megaship, a hundred metres up. Horza felt the strength ebbing from his fingers and arms. He looked through the helmet visor at the interior of the shuttle only a few metres away as, millimetre by millimetre, he slipped away from it.