‘I don't see anything,’ said Tab.

‘But you can see something, right?’

‘Oh.’ Amelia was right. For the past week Tab hadn't been able to see the house across the street. Now, however, she could even see the Pandro's Tower which was a good three blocks away. ‘The fog's breaking up,’ she said.

All eyes went to the curtained alcove where the bandaged Torby tossed and turned in the grip of fever. The children exchanged dark looks. By mutual agreement, Torby's abilities – if that was what they were – had been kept from the Council. Tab had had to convince Fontagu, but under threat of being named as the man who had caused the Rupture, he had agreed to keep quiet.

At that moment, a jolt rippled through Quentaris.

‘They've furled the main sail, and we're coming hard about,’ Philmon said. ‘You know what, I think they've found a vortex.’

‘We're leaving this world?’ Tab exclaimed.

Philmon nodded. ‘We've been tracking the vortex for days, but it keeps shifting.’

Outside, there was a sudden flood of sunlight. Tab's spirits lifted instantly.

But the next moment Amelia cried out, ‘I don't believe it!’

Tab turned and followed the direction of Amelia's gaze. Propellers humming, sails straining at their ropes, the dark fortress of Tolrush thundered toward them.

Horns blared. Bells tolled.

‘Tab!’ Amelia called as her friend ran to the door and flung it open. ‘You're confined to quarters! And what about Torby?’

Tab stopped in her tracks. Amelia was right. She couldn't leave Torby when he was sick.

‘Do you mind if I come in?’ said a nervous voice right behind her. It was Fontagu. Tab's eyes lit up.

‘Just the person I wanted to see,’ she said. ‘Torby's in there. He's got a fever. If he wakes, give him this herbal tonic and tell him I'll be back soon. Come on, you two!’

And she was out the door.

As the trio ran through the streets, Tab pointed up at the dark mass of Tolrush. ‘Look! They're attacking us with everything they have.’

Amelia and Philmon had already seen the flying lizards and demon-like dragons bombarding the city. The animals were normally used for scouting and hunting.

Tab's mouth gaped. ‘They must really be desperate to be using their squadrons. They'll get snared in the rigging. Come on, you two, this one's all or nothing!’

Pandemonium reigned. Everyone but the very young or ancient was rushing to their battle stations. Streams of people were charging up onto the perimeter wall; boats were being launched to defend the port area; specially trained and equipped soldiers were trudging across the Barrenlands to meet infiltrators who had landed to starboard.

‘Look out!’ someone screamed.

A giant flying lizard, its black shape blotting out the sun, screeched as it tumbled from the sky. Stuck full of arrows, it wheeled, pitched, and plummeted amidships. More creatures thudded into the Square of the People. Tab could see squads of Verris’ archers sending volleys of arrows skyward.

Tab pounded to the nearest section of the perimeter wall and raced up the stairs. The fighting was thick on all sides. Tolrush had landed a dozen boarding parties all across Quentaris, having clearly learnt their lesson from last time. The nearest such melee was only yards away.

Ignoring this hubbub, Tab pressed her hands to either side of her forehead. Fixing her eyes on a marauding lizard she sent out her mind, questing. She mind-melded instantly with the predator. Fighting through the creature's jumbled thoughts she tried to take control of it. The creature wavered, its handler countermanding Tab's order. The lizard, disoriented, narrowly missed the bronzed minarets of the Cathedral of the Holy Benefactor Mushin. It tried to navigate the narrow canyon between two tenements but clipped a roof, lost control, and cartwheeled into the ground.

‘Yes!’ Tab cried at her small victory. By now, though, the sky was thick with flying monstrosities. Many had landed, depositing their passengers before flapping back to Tolrush for reinforcements. Screams and angry shouts rose on all sides. Quentarans fought fiercely and died bravely but the outcome of this battle wasn't much in doubt. Vastly outnumbered and low on morale, it was only a matter of time before Tolrush overwhelmed them.

Somewhere overhead, rigging snapped and twanged. Tab stared as a canvasser fell like a stone, his scream stopping abruptly when he hit the deck. Some were plucked from spars and walkways while others scurried like rodents into rat-holes as the flying lizards passed overhead. There are too few of us, Tab thought. We're… sunk…

As though to confirm her worst fears, an entire cross-spar, sail and all, came crashing down. Sailors scrambled for their lives. The vast billowing canvas settled languidly over several city blocks. Ironically, this saved many from the attacks of the lizards. Conversely, and no doubt part of the saboteurs’ plans, the fallen rigging and sails gave better access to the enemy's airborne troops.

Amelia, who was using levitation spells to toss Tolrushians overboard or deflect killing strokes of sword or pike, joined Tab on the battlement.

‘Where's Philmon?’ gasped Tab. She was winded, having sent yet another lizard crashing into the ground.

‘He went to his battle station. Watch out!’

Amelia magically deflected a thrown axe that would have split Tab's head in two.

‘This is madness!’ Tab screamed.

‘Look at that!’ Amelia said, shaking Tab.

Tab followed her pointing finger. A vast mushroom-shaped vortex turned ponderously in the distance. Livercoloured clouds broiled in its mouth, lightning crackled. It was more frightening than any vortex Tab had ever seen.

‘We're going into that?’ she whispered.

‘Well, if we stay here, we die,’ cried Amelia, pulling Tab to safety as two Tolrushians ran past.

Tab shivered. No one liked flying through a vortex. It felt too much like entering banned rift caves. She shook her head as she tried to focus on the task at hand: namely, stemming the airborne attack.

A three-lizard squad darted in low under the forward sail. As Tab watched, they flew between tall buildings and towers, down where the ranks of Verris’ archers could not assail them. As they swept past her, Tab recognised one of the riders on the middle beast: Kull Vladis.

The lizards landed in a small square and the Tolrushians quickly dismounted.

‘I can't see them!’ Tab cried, craning her neck. ‘Stay here,’ she told Amelia, then raced down the stairs.

Tab reached the square just in time to see the last of the Tolrushians disappear into a culvert at the base of a tower. Running lightly and quietly to the entrance, she peeked inside. She saw torches flaring in the distance, and bit her lip. Should she follow?

Quentaris was undermined by catacombs, but this tunnel had a carved look which meant that it was probably somebody's escape route. Only thieves and royalty had need of such tunnels. And Tab had an idea she knew just where this tunnel would lead.

Cursing herself for an idiot, Tab ducked inside and followed the distant lights, being careful to stay back as far as she could without losing sight of her quarry.

The tunnel twisted and turned, dropped steeply at one point into that maze-like underworld that existed beneath Quentaris, then thankfully started up again. And all the time Tab's heart hammered. If she lost sight of the torches, she would be marooned in the pitch dark: she would have no hope of finding her way out of here again.

With these chilling thoughts to keep her company, Tab hurried along in the Tolrushians’ rear, stumbling over unseen objects, barking her shins, and once bashing her head on a projecting beam. She nearly lost sight of the rear-most torch then and only the fact that the Tolrushian bearing it stopped to retie his sandal allowed her to catch up again.