"Hey, screw that, Father."

"It's important, boy. Might all wind up depending on that receiver before tonight's out. Gotta be done properly."

Jules looked away across the fields, anger showing in the set of his shoulders. Eleanor wondered if he was blaming her.

"Radio communications to the manor are out," Victor said. "There's a jammer blocking all frequencies."

"Yeah I know, a Grumman ECM788," Teddy said. "We got us a tactical message laser, nothing gonna interfere with that. Jules'll take the receiver up to the top of the valley; Son says we'll have direct line of sight from there to the manor."

"Christ," Victor muttered in an undertone. "Walshaw's going to kill somebody when this is over."

"Anything else?" Teddy asked. "OK. We'll ask the Lord for his blessing."

The Trinities bowed their heads. Eleanor saw Victor look round in surprise. She lowered her own head.

"Lord, we ask for your guidance and protection in our task ahead. We're going to see if we can help our lost brother and sister, and we believe our cause is right and just. If in your wisdom you could grant us success we will remain thankful for such mercy for the remainder of our mortal life. Amen."

"Amen," the Trinities whispered in chorus.

"Amen," Eleanor added.

"OK. Tool up. Move out."

The Rockwell was a wound monolattice-filament tube one and a half metres long and twenty centimetres wide. It had a broad leather strap so Eleanor could carry it across her back. She lifted it up and realised just how dependent she was going to be on the Trinities for protection from the sentinels. She was confident she could carry it to the manor, but the weight was going to slow her down.

After she'd settled the cannon into place, Suzi clipped a Braun laser pistol on to her belt. "Twenty-five shots, or a five-second continuous burn," Suzi said. "Don't fret yourself none about getting it wet, it's waterproof." Five power magazines were added. Eleanor felt like protesting about the extra weight, but held her tongue. Suzi's normally infallible barbed humour had evaporated.

The seven of them splashed into the middle of the stream. Teddy and Suzi paired at the front, Roddy took up station on Eleanor's right-hand side. On her left was Victor, who was carrying a couple of high-density power units for the Rockwell along with the message laser. Nicole was on his left, and Des brought up the rear.

The graphics display had reproduced a perfect profile of the stream's winding course for her; a memory loaded straight from the security core Royan had burnt. It'd been built by the landscape team who had fashioned the manor's grounds; they had made the actual bed from fine, hard-packed sand, then layered it with long strips of worn limestone pebbles. The width was a near-constant four metres where she stepped in, with the water coming halfway up her shins. After a minute she managed to find the best rhythm for walking, not quite lifting her sole out of the water. At least they were going in the direction of the flow. Heat was draining out of her feet. Her toes were already numb.

Teddy held his hand up. "OK, people. Hoods on."

Eleanor reached back and pulled it over her head. A circle of skin around her eye sockets tingled briefly. The photon amp fed its monochrome image into her retinas, suit graphics confirming the neck seal's integrity. She breathed air through the filters, dry and metallic.

She took it as an offhand compliment that nobody checked to see if she'd fixed her hood properly.

The stream ran through a thick braided cassia hedge ten metres ahead, the dividing line between the sugar-cane fields and a broad tract of undulating meadowland. Eleanor saw a line of posts spaced seven or eight metres apart had risen up in front of the hedge, two metres high and featureless except for a small red light flashing away on top. The earth around them had been torn as they'd pushed their way up out of their recesses.

Her photon amp picked out a band of forest about eight hundred metres past the hedge. She didn't like to think about lugging the Rockwell all that way. And how far was the manor beyond the forest?

THREE HUNDRED METRES, the graphics told her, Oh well.

"Boundary," Teddy said. His voice was muffled by his hood filters. "Now is when it starts to hit the fan. OK, Suzi."

Both of them brought up their AK carbines. There was a bass stutter and the two posts on either side of the stream disintegrated. They switched their aim to the next pair.

In the end they took out eight before Teddy was satisfied. His arm signalled the advance.

Eleanor meshed the infrared into her image, alert for any sign of the sentinels. The function fuzzed the outlines a little, but she saw a couple of pink spots pelting away from the stream. Stoats, invisible before.

The meadowland here offered little or no cover. The grass was knee-high, laced with weeds and keck. Nothing had grazed on it for months.

Two hundred metres past the boundary markers and Teddy stopped them again. He plucked one of the smallest spherical grenades dangling from his waist and twisted the timer. "Down."

Eleanor squatted, her backside below the surface of the water. Growing cold. Teddy lobbed the grenade out across the meadowland. Crouching down. Five seconds later there was a barely audible thud.

Another line of posts rose out of the ground ahead of them. Eleanor could hear grass and soil ripping. This time there were no red lights on top.

Suzi and Teddy took aim with their AKs.

PRESSURE-SENSITIVE PICKET, said the graphics, when she asked. There were another two picket lines between them and the forest. The memory core didn't have any information about what they did if you walked between them. Presumably, if you were talented enough to be on this kind of mission you ought to know.

They yomped on.

The stream's banks were growing perceptibly steeper. Eleanor thought the water was getting deeper too. Her view across the meadowland was shrinking. Thick patches of watercress choked both sides of the stream. Roddy and Nicole had to walk through it, kicking away a tangled wrap of tendrils from their legs every few paces.

Eleanor was glad of the brief rest when they came to the next picket line.

Victor pressed his head up to hers. "You OK?"

The AKs demolished another set of pillars.

"Fine."

There was a quick squeeze on her upper arm.

Suzi and Teddy reloaded their carbines, jamming in fresh magazines with hard snaps.

The stream fell on harder rock. It was narrower now, deeper. The water came up to Eleanor's knees, Teddy slowed the pace, edging cautiously round the sharper turns.

"How about a couple of us walk along the side?" Suzi said. The banks had risen until they were level with Eleanor's head. She couldn't see much of the meadowland now. What was visible seemed to be small deep hollows, and ground-hugging bushes. There could've been anything hidden out there. Her breathing was coming faster.

"No," Teddy said.

Suzi didn't argue. Discipline, Eleanor thought it would've made a lot of sense to have someone who could look out over the meadowland.

They rounded a bend and saw the last line of picket pillars had already emerged from the earth. Five AK carbines came up in reflex. There was a moment's pause.

The sentinel came at them through the air like a guided missile. Eleanor saw it as a pink streak arcing overhead, forelegs at full stretch, an angel of death reaching for Des. All five AKs opened up, filling the air with a guttural roar. Des was falling backwards, still firing. The sentinel's heavy streamlined body juddered in mid-flight, its edges distorting as the slugs chewed it apart. Momentum kept it going. Des hit the water. Eleanor's image was suddenly degraded by a spray of blood painting her hood's photon-amp receptors. The sentinel landed almost on top of Des, already dead.