‘Careful!’ I hissed. ‘You nearly broke my nose!’

‘Good!’ said Cyan, and drew the shutters to. I pulled them wide and stepped down into the room.

The tower-top room was big, ten metres square. A single bed and side table by the fireplace were the only furnishings apart from empty crossbow bolt racks on the walls. It was ill-lit, no fire burning in the huge stone grate, but lamplight shone up through holes in the floor, through which arrow sheaves could be hoisted. Cyan’s lantern gave a pool of colour on the table next to her silver plate and fork and a chessboard that seemed to have stalled halfway through a game.

Lightning’s dog rushed up from the bed, barking, then recognised me and sat down by my feet. I closed my wings, the primaries sliding over each other like fans. ‘I only have an hour.’ I said. ‘I shouldn’t be here.’

‘Well, I’ve been trying to write to you for hours,’ Cyan retorted. ‘Where have you been? What’s going on? No one’s visited me. I haven’t spoken to anyone except the guards for five days!’ She retreated to sit on the plain bed, leaning on a blanket roll against the wall, and gave me a baleful look. ‘Will you let me out?’

‘I’m sorry, Cyan; no. The least the Castle can do is save your life.’

‘You could rescind Daddy’s orders if you wanted, and the guards would release me. Why are you so afraid of him?’

‘I’m not.’

Her forehead furrowed. ‘After the guards dragged me out, what happened? What did Daddy say?…No, don’t tell me. I hate him. Old titwart. I can’t believe he’s done this to me!’

I stalked across the room, pushed my ice axe hanger behind me and sat down on the fireplace surround. I ached all over and I felt sick. The constant undercurrent of panic and sleep deprivation we were all living with was taking its toll. I said, ‘I brought a letter from Rayne.’

‘One letter in five days!’

‘You don’t know how hard-pressed we are-’ I gestured at the window in the direction of the town. ‘Everyone’s terrified and San is driving us like pack horses. I’ve been sending dispatches to position battalions for the advance in two days. I spent the last hour fending off journalists and checking Lord Governor Purlin Brandoch’s cavalry slinking in on second-rate nags. In an hour’s time I have to collect letters for your father-’

‘Huh!’ she cried.

‘Hand-deliver the important ones and collect replies. I think I’ll report that you’re still furious.’

‘I’m fine,’ she said, not looking it.

‘Do you have a message for him?’

She glared at me defiantly. ‘If the bastard is in a good mood, tell him I’m dying of melancholy. If he’s feeling miserable, tell him I’m singing like a lark.’

‘I can’t fathom what mood he’s in. He’s bottled everything up, and he seems very detached, as if he isn’t allowing himself to think about it.’

I pulled a sheaf of letters from my coat pocket and leafed through until I found Rayne’s envelope. Cyan accepted it and scratched the seal off with her fingernails.

‘Is Rayne the only person who’s thought of me?’ she asked.

‘Don’t be ridiculous. No. Hasn’t Lightning given you his dog for company? He’s been sending you the best food, otherwise you’d be eating biscuit and salt beef, like the rest of the Zascai.’

‘So he hasn’t forgotten me?’

‘No. He’s incredibly busy too.’ I sighed, wondering how I could make her understand what was happening. ‘This is the biggest advance of all time. When they start lining up in formation, you’ll see what I mean.’

Cyan lay back on the bed. ‘I tried to write to you but I couldn’t concentrate. I made a complete arse of myself.’

‘Yes, you did. I wish I’d-’

‘Oh, I don’t care what you’d have done. I wasn’t Challenging you.’ She put an arm across her eyes and said, ‘Pissflaps. Will you let me free, Jant; please?’

‘Look, Lightning put you in here for a reason. If I let you out, and you get killed, he would shoot me. If through your actions, you get someone else killed, I would be blamed. And I don’t fancy that.’

‘It’s like being in prison!’

I stared at her. Her truculent tone was beginning to pique. ‘Trust me, it’s nothing like being in prison.’

‘Oh, Jant’s angry.’

‘Stop that! Behaving like a ten-year-old is what landed you in here.’

‘Please set me free. I’ll reward you. I’ll give you-’

‘It won’t happen, so don’t try to tempt me.’

The deerhound leapt on the bed and Cyan took its head in her lap. ‘Good dog, Lymer.’

I knew she had never really seriously considered joining the Circle. Everybody harbours a secret wish to be immortal. Everyone, now and then, wonders what it would be like. But like most people Cyan had never genuinely entertained the thought, and I bet, in her head, she keeps repeating over and over what she did and imagines the Eszai laughing at her.

I knelt down with a cheerful air and began to build a fire in the grate, refusing to be overwhelmed by the awkward situation. Cyan watched me with animal antipathy.

I said, ‘I recognise a spur-of-the-moment Challenge when I see it. All Eszai recognise bluster, too. We’re often Challenged by people who know they’re not capable of beating us but simply want the attention. By the Castle’s rules we have to take each and every one seriously, and separately, because you never know when one is a true talent…’

‘I don’t withdraw my Challenge, if that’s what you’re driving at.’

I gathered handfuls of the dried moor grass, heather sprigs and sprays of thyme strewn as a floor covering. I used them for kindling and lit some skilfully with the last of my matches. I swung the kettle spit above the flames and began to make some coffee.

‘Rayne was recently Challenged,’ I continued. ‘By a healer, some Awian noblewoman. High Awian is a useless language for science, and Rachiswater university mainly teaches arts. They’re not far behind Hacilith though. This woman believed in the properties of precious metals to cure diseases. She made gold mirrors and shone light into the patients’ eyes. It was no laughing matter…her bedside manner was so good many patients were cured by their own expectations. Rayne set her a Challenge at the front, and she learned that no shiny mirrors or soothing music can stuff a patient’s guts back in.’ I shrugged. ‘Only three places in the Circle have never changed hands: Rayne’s, Tornado’s and your father’s. Everybody who Challenges them makes a fool of himself. You’re not the only one.’

‘It was his fault,’ she said. ‘He pushed me to it. In front of the Emperor and everything.’

‘Cyan, I’ve better things to do with my free hour than talk with a stroppy cow.’

‘Please tell the guards to release me.’

‘No. After seeing you make an exhibition of yourself and humiliate Lightning, even though I told you to sit down, I’m surprised I’m here at all.’

‘I don’t regret it,’ she said.

‘He’s been the best archer for over fourteen hundred years!’ I tried to make her understand that length of time. ‘Awndyn didn’t exist when he was mortal. Or Peregrine. They didn’t have highways, they didn’t even have coaches. They used to have ballistae and now we have espringals, thanks to the effort of San knows how many Artillerists. Lightning improved bows, from the early awful type they had before the Circle, to the shit-hot bows you use now. He’s lived through all this, and been on top all the time! It’s as much his day now as it was then. So it’s bloody stupid to Challenge him.’

‘’Spose you’re right.’

‘He’s seen the four corners of the world…Five, including Tris.’

‘In the past, though. He lives in the past. And Swallow lives in the future-but I live in the present.’ She got up and crouched in front of the fire, rubbing some warmth back into her hands. ‘He hasn’t been a father to me at all. He’s been more of a father to you than to me.’

‘Not really. I-’