Yuri pulled her roughly against him, his soaking trousers tangling round his knees. He heard an alarmed shout that was cut off. Three of the girls had pushed Mansing under the water, his legs were thrashing above the surface. The girls were laughing hysterically, muscles straining with the effort of keeping him down.

“Hey—” Yuri said. He couldn’t move because of his stupid trousers.

“Yuri,” Samantha called.

He turned back to her. She was opening her mouth wider than he would have believed physically possible. Long bands of muscle writhed around her chin as if fat worms were tunnelling through her veins. Her cheeks started to split, beginning at the corners of her mouth and tearing back towards her ears. Blood leapt out of the wounds in regular beats, and she was still hinging her jaw apart.

Yuri stared for one petrified second then let loose a guttural roar of fright that reverberated round the impassive sentinel trees. His bladder gave out.

Samantha’s grisly head darted forward, carmine teeth clamping solidly round his throat, her blood spraying against his skin.

“Randolf—” he yelled. Then her teeth tore into his throat, and his own blood burst out of his carotid artery to flood his gullet, quashing any further sounds.

Randolf howled in rage as his master fell into the water with Samantha riding him down. But one of the other girls looked straight at him and hissed in warning, flecks of saliva spitting out between her bared teeth. The sayce turned tail and sprinted back into the jungle.

“Power’s going. Losing height. Losing height!” The BK133 pilot’s frantic voice boomed out of the command centre’s AV pillars.

Every sheriff in the room stared at the tactical communication station.

“We’re going down!”

The carrier wave hissed for another couple of seconds, then fell silent. “God Almighty,” Candace Elford whispered. She was sitting at her desk at the end of the rectangular room. Like most of the capital’s civic buildings, the sheriff’s headquarters was made of wood. It sat in its own square fortified enclosure a couple of hundred metres from the governor’s dumper, a simplistic design that any pre-twentieth-century soldier would have felt at home in. The command centre itself formed one side of the parade ground, a long single-storey building with four grey composite spheres housing the satellite uplinks spaced along the apex of the roof. Inside, plain wooden benches ran around the walls, supporting an impressive array of modern desktop processor consoles operated by sheriffs seated in composite chairs. On the wall opposite Candace Elford’s desk a big projection screen displayed a street map of Durringham (as far as it was possible to map that conglomeration of erratic alleyways and private passages). Conditioners hummed unobtrusively to keep the temperature down. The atmosphere of technological efficiency was spoilt slightly by the fans of yellow-grey fungus growing out of the skirting-board underneath the benches.

“Contact lost,” Mitch Verkaik, the sheriff sitting at the tactical communication station reported, stone faced.

Candace turned to the small team she had assigned to monitor the posse’s progress. “What about the sheriffs on the ground? Did they see it come down?”

Jan Routley was operating the satellite link to the Swithland survivors; she loaded an order into her console. “There is no response from any communicator on the Swithland or the Hycel . I can’t even raise a transponder identity code.”

Candace studied the situation display projected by her own console’s AV pillar, more out of habit than anything else. She knew they were all waiting for her to rap out orders, smooth and confident, producing instant perfect solutions like an ambulatory computer. It wasn’t going to happen. The last week had been a complete nightmare. They couldn’t contact anyone in the Quallheim Counties or Willow West any more, and communications with villages along the Zamjan were patchy. The reinforcement flights to Ozark were a stopgap at best; privately she had intended that the fresh men and weapons would simply safeguard an evacuation of settlers down the river. She had long since abandoned the idea of restoring order to the Quallheim Counties, confinement was her best hope. Now it looked like Ozark was inside the affected zone. Seventy men and almost a quarter of her armoury.

“Call the second BK133 back to Durringham right away,” she said shortly. “If the invaders can bring down one, they can bring down another.” And at least ten sheriffs with their heavy-duty weapons would be saved. They might need them badly in the weeks to come. It was pretty obvious the invaders were intent on complete domination of the planet.

“Yes, ma’am.” Mitch Verkaik turned back to his console.

“How long before the observation satellite makes a pass over the paddle-boats?” Candace asked.

“Fifteen minutes,” Jan Routley answered.

“Program it for an infrared overscan fifty kilometres either side of its orbital track, see if it can locate the downed BK133. It shouldn’t be too hard to spot.” She rested her chin in her hands, staring blankly at her desktop processor. Protecting Durringham was her priority now, she decided. They must hold on to the city until the LDC sent a combat force capable of regaining the countryside. She was convinced they were faced with an invasion, the hour-long briefing she’d had with Kelven Solanki that morning had put paid to any final doubts. Kelven was badly worried, which wasn’t like him at all.

Candace hadn’t told her staff what Kelven had said to her, about the possible use of sequestration and river-boats that might have already brought a preliminary platoon of invaders to Durringham. It didn’t bear thinking about. There were three chairs conspicuously empty in the command centre today; even the sheriffs were reverting to a self-protective mentality. She couldn’t blame them; most had a family in the city, and none had signed on to fight a well-organized military force. But she’d agreed to cooperate with the Confederation Navy office in reviewing satellite image records of river traffic for the last fortnight.

“We’re receiving the images now,” Jan Routley called out.

Candace stirred herself, and walked over to the woman’s position. Kilometre after kilometre of jungle streamed across the high-definition holoscreen; the green treetops were overlaid by transparent red shadows to indicate the temperature profile. The Zamjan leapt into view at the bottom of the screen, Swithland ’s stern jutting out onto the water from under the bankside canopy of vegetation. Graphics flashed across the holoscreen, drawing orange circles around a glade close to the water.

“It’s a fire,” Jan Routley said. She datavised an order into the desktop processor to centre on the infrared source. The clearing expanded on the screen, showing a bonfire burning in its centre. There were blankets and the unmistakable white cargo-pods of homesteading gear littered about. Several trees had been felled on one side. “Where have all the people gone?” she asked in a small voice.

“I don’t know,” Candace said. “I really don’t.”

It was midafternoon, and the Coogan was twenty-five kilometres downriver from the abandoned paddle-boats when Len Buchannan and Darcy spotted the first pieces of flotsam bobbing about in the water. Crates of farmsteading gear, lengths of planking, fruit. Five minutes later they saw the first body: a woman in a one-piece ship-suit, face down, with arms and legs spread wide.

“We’re turning back now,” Len informed him.

“All the way to the mouth of the Quallheim,” Darcy reminded him.

“Shove your money and your contract.” He started turning the wheel. “You think I’m blind to what’s going on? We’re already in the rebel area. It’s gonna take a miracle to get us downriver if we start now, never mind from another hundred and fifty kilometres further east.”