The mirror beam now carved across the eastern wall, towards the enemy ranks on the other side. It was not causing as much confusion as before, but the lyrinx were still retreating from it.

Fighting broke out near the northern wall. A band of some twenty lyrinx had advanced in a rush that took them right through a line of human soldiers. The beam did not shift to counter this new threat, but kept moving back and forth across the ranks of the enemy, on the far side of Snizort.

'That was just a diversion,' cried Irisis. 'They're retreating.'

The group of lyrinx carrying the baggage rose into the air together then spread apart, holding low to the ground until they crossed the southern wall, where there was little fighting. There they climbed rapidly, disappearing into the smoky haze that hung over the fortress.

'They're mighty mancers' said Flydd, 'to fly under these conditions. Whatever they're carrying, it's more important than winning the battle.'

There was no way to bring them down; the lyrinx were out of range of the catapults and javelards, and the fleet of air-floaters did not seem to have noticed. The flying lyrinx reappeared out of the haze, flew into a pall drifting from the molten remains of the node, and vanished.

The scrutator shook his head. 'I think we're going to regret that.'

Inside Snizort, the remaining lyrinx began to swarm over the western and southern walls. Fighting their way through the few human defenders nearby, they headed south-west down the tar-crusted valley. One by one the detachments outside the walls turned to follow them. Those lyrinx not yet called to the orderly retreat fought on.

The air-floaters turned together, drifting closer so as to direct the beam at a skirmish on the northern wall. The lyrinx must have been waiting for that, for three catapults fired at once and their balls of stone went through the mirror sail, tearing gashes which spread until the fabric hung down in tatters. It was released, the shreds winking in the air like tinsel. Each machine produced many smaller mirrors, the size of large shields, which the soldiers aimed individually. The effect was not as dramatic, but the lyrinx still broke when the beams struck them.

Eiryn Muss, Flydd's personal prober, or spy, came up beside him, whispering in his ear. Flydd looked surprised. He whispered back and Muss, an entirely nondescript fellow in his present disguise, slid away.

'What was that about?' said Irisis.

'Scrutators' business,' he "replied tersely.

The air-floaters continued their work for another hour, until, suddenly, it was all over.

'The last of the lyrinx are retreating,' said Flydd. 'We've survived — at least until nightfall.'

'So you think they'll come back?'

'You can't always tell with lyrinx. Since they've had to abandon Snizort, they may not. But then again, the opportunity to destroy our army in the dark may be too tempting to resist.'

The air-floaters were rotoring towards the command hill, but they did not all make it. A squad of lyrinx catapult operators had remained in position, camouflaged, waiting for just that moment.

A ball went right through the cabin of the lowest air-floater, shattering it into splinters and sending at least a dozen people to their deaths. Another missile struck the ovoid bag of a second machine, deflating it instantly. Fortunately it was, by then, only a few spans above the flank of the hill. The crash made a loud noise, though the machine did not seem to be damaged further. The other ten air-floaters made it to the ground a safe distance from the catapults.

'The lead one's flying the Council flag,' said Flydd, squinting through his spyglass again. I wonder who can be in command? Surely not Ghorr. The chief scrutator would never do anything to risk his mangy hide.'

'We'll soon find out,' said Irisis.

'I'd better go to meet them.'

Again Irisis felt that foreboding. She was following the scrutator when he turned and said, coolly, 'You won't be needed, Crafter. Wait here for my orders. If you would be so good as to ask Fyn-Mah to come down?'

The sudden, cold formality was like a slap in the face. He kept going so she headed back to the tents, found Perquisitor Fyn-Mah and gave her the message, then resumed her pacing around the hill.

Flydd did not hurry, for he also had an uncomfortable premonition. Despite their truly heroic efforts, the mission to destroy the node-drainer had been a failure, doomed before it began. The device the Council had given him had been faulty, perhaps deliberately so. Because of that, a third of the army had been lost. Flydd could not avoid the blame, nor would he, had he been able to. The soldiers lives had been in his hands, and he had failed them. Though inured to war, and hardened by it, every death weighed on him.

But another leader might have won this battle, he thought, despite the loss of the node. Another leader might have seen that the mission to the node-drainer was fatally flawed. Another leader might have done a hundred things to avert this disaster. Having done none of them, he could only feel culpable. If duty required him to pay, he would do so.

Nonetheless, his heart lurched when he saw who was getting out of the air-floater that had crash-landed. A tall, deep chested man, apparenthr in hale middle age, he was broad shouldered, dark haired, full bearded and of noble good looks, except when his smile revealed those vulpine teeth. It was Ghorr, the chief scrutator, and his temper looked fouler than usual. Behind him were ranked the ten other members of the Council of Scrutators, four women and six men. All were bruised, dishevelled and furiously angry.

Though Flydd was still a scrutator, he was no longer on the Council. He ran down to help Ghorr over the side, but the big man smacked his hand away. Blood droplets clustered on his left eyebrow from a gash at his hairline.

'I'm glad you've come,' said Flydd, putting out his hand. 'Your mirror is a fine innovation, though it'll only work once. The next time we meet the enemy they'll have a tactic to neutralise it.'

The chief scrutator ignored the gesture. 'I should never have allowed you back!'

'You should have led by example,' said Flydd, 'and done the job yourself. But that was never your way, was it, Ghorr?'

Ghorr brushed General Tham's hand aside, too, and panted to the top of the hill, where he paused to survey the battlefield. It was a pose, of course — he'd had hours to study the scene from the air-floater.

The other scrutators followed, and not even Flydd's former friend, Halie, the dark little scrutator, had a sympathetic glance for her former colleague. Flydd had expected no less. Though few knew it, the scrutators answered to a higher power — the shadowy Numinator. Someone must take the blame and he was the man responsible.

Ghorr was about to speak when the last of the air-floaters edged up over the hill, to settle directly in front of the command tent. A small man climbed over the side, rather awkwardly, for he had only one arm. Flydd gave an involuntary gasp. If there was one person he had not expected to see, it was this man.

As the air-floater lifted off and headed down the slope, the man turned and the sun caught a gleaming platinum mask that covered the left side of his face. Twin metal bands encircled his head like a helmet, and the hole in the cheek plate of the mask had been repaired. The single eye had the glare of a deranged man.

'You won't get away with it this time, Scrutator Flydd,' said Acting Scrutator Jal-Nish Hlar.

Irisis was catching a moment's rest in the shade behind a tent when Perquisitor Fyn-Mah shook her awake. Fyn-Mah was petite, black of hair and eye, with a stern, frozen beauty that deterred rather than attracted. The perquisitor normally exuded dignity, but now she was flushed as if she had run a long race.