When everything seemed ready he flicked the Q-switch once and watched a slender, candy-coloured beam of light suddenly connect with the glass like tidy bolt of lightning. Then he switched the unit off and went to inspect the damage.
Bending down beside the glass Mitch found a perfect hole, no wider than a dime, through which cool air was now blowing. He almost cheered.
His plan was simple if laborious. He would cut a number of tiny perforations in the glazing until there were sufficient to hammer out a larger hole that he might crawl through.
He picked up the walkie-talkie and transmitted the good news to Jenny.
'That's great,' she said. 'Just be careful. And leave this thing switched on, will you? I hate it when you turn it off. If I can't see you're OK, at least I can hear you are.'
'It's going to take a while,' said Mitch, but he left the unit turned on anyway.
He moved the laser rod a fraction to the left of where he had aimed before and prepared to cut his next hole.
This time Ishmael was ready for him.
In the half second it took Mitch to flick the laser's Q-switch, Ishmael coerced the remainder of the silver atoms in the glass compound to join together and form a silvered surface that reflected the laser beam straight back at him like an enormous mirror.
With a yell of fright Mitch threw himself to one side, narrowly avoiding the excited beam of light. But as he fell he hit the front of his head hard on the desk, and then the back of his head harder still as he collapsed on to the marble floor.
Jenny watched Curtis try to raise Mitch on the walkie-talkie and, despite the stifling heat inside the Gridiron, she felt a chill. When she realized that she was holding her breath she let out a long sigh. Curtis clicked the unit once again. 'Mitch? Come in, please.'
There was a long silence.
Curtis shrugged. 'He's probably too busy.'
Jenny shook her head and laid down the walkie-talkie. 'Here,' she said. 'I think someone else better look after this.'
Joan picked it up. 'Jenny,' she said, 'handling that laser is probably about all that he can cope with right now.'
'You don't have to pretend for my sake,'Jenny said quietly. 'We all heard Mitch.' She swallowed hard. 'I think everyone knows it. He can't answer because…'
Helen caught Jenny's hand and squeezed it. Jenny coughed and got a hold of herself. 'I'm OK,' she said. 'But I think we ought to decide what to do to try and get out of here. I promised Mitch we wouldn't give up.'
'Wait a minute,' said Birnbaum. 'Shouldn't one of us go down the ladder and see if Mitch is all right? He might be injured.'
'Mitch knew the risks,' said Jenny, surprising herself. 'I don't think he would want that. I think he would want us to go on. To try and get out of here.'
They were silent for several minutes. It was Richardson who spoke first. 'The clerestory,' he said firmly.
'Where's that?'
Richardson looked up at the clerestory.
'The roof. The glass is thinner up there.'
'You mean, smash our way out of here?' said Helen.
'Sure. Why not? We climb up the open riser shaft. Then use the travelling ladder and the pitched gantry to get on to the roof. That's patent glazing up there. Pre-stressed borosilicate. No more than six or seven millimetres thick. The only problem is what we do when we get out there. The Faraday Cage extends to the top of the mast, so your radio won't be any good. Maybe we could wave at a helicopter or something. Or attract attention with your gun — fire a few shots into the air.'
Curtis laughed.
'And risk being shot?' he said. 'Some of those flying assholes are a little trigger happy these days. Especially since all the rooftop sportsmen in the 'hood have started to use 'em as fucking skeets. Don't you watch the news? There's some crazy asshole who's been firing rockets at them. Wing-shooting a whirlybird is the latest thing. Besides, I used all my ammunition on that washroom door.' Curtis shook his head. 'What about the window-cleaners? Don't they use some kind of power climber?'
'Sure. There's a suspended cradle. But it's the usual fucking problem. Ishmael. Suppose you're on the thing and it decides to play games with it? With us?'
'Perhaps we could light a fire on the roof,' said Jenny. 'You know, make a beacon.'
'What with?' said Richardson. 'Nobody smokes, remember? And the cooker doesn't work.'
'And to think that I have all the fire-making materials we need in my car,' said Jenny. 'That's why I came here yesterday. I was supposed to perform a feng shui ceremony to drive out the building's devils. Only…'
'Maybe we could throw some kind of message over the side,' Helen suggested. 'Saying that we are trapped up on the roof. Someone is bound to find it before long.'
'If only those protesters were still around,' said Richardson.
'It's worth a try,' said Curtis.
It was Richardson's turn to grin. 'I hate to piss on your sushi box, but you're forgetting one thing, folks. This is a paper-free office. Almost everything we write here is done on computer. I may be wrong. I hope I am. But I think we'd be hard pushed to find a piece of paper. Unless you want to throw a laptop on to the street?'
'There's my copy of Vogue,' said Helen. 'We could tear out a page and use that.'
Richardson was shaking his head. 'No, as I see it there's really only one thing to do when we get out on to the rooftop.'
Curtis went to speak to Beech and found him, as before, facing Ishmael's quaternion image over the chessboard. The room still smelled strongly of gas.
'Mitch didn't make it,' he said quietly.
'Perhaps the Cyclops killed him,' said Ishmael.
Curtis stared at the quaternion head on the other side of the screen chessboard. 'Did anyone speak to you, you ugly bastard?'
Beech sat back from the computer screen and rubbed his tired eyes.
'That's too bad,' he said. 'Mitch was a hell of a nice guy.'
'Look,' said Curtis. 'We're all getting out of here. There's a plan.'
'Another one?'
'We're going to try and go through the clerestory.'
'Oh? Whose idea was that?'
'Richardson's. Come on. Put your shoes on and let's go. If you're right about this time bomb we've only a few hours left.'
For a moment the hourglass reappeared on the screen.
'You have less than ten hours to win the game or clear the area before atomic detonation,' said Ishmael.
Beech shook his head.
'Not me. I've decided to stay here. I still think I can win us some extra time. And I've no head for heights.'
'Come on, Beech. You said yourself that staying put is not an option.'
Ishmael announced that his Black Rook had captured Beech's Queen to check his King.
'What are you, crazy? You just lost your fucking Queen. And you're in check.'
Beech shrugged and faced the screen again. 'Nevertheless, this is not a bad position. Not half as bad as that last move might suggest. You can do what you like, but I'm going to play this out.'
'The computer's just fucking with you,' said Curtis. 'It lets you think you stand you a chance and then moves in for the kill.'
'Maybe.'
'And even if by some miracle you did beat it, how do you know
Ishmael won't go ahead and torch the building anyway?'
'Because I trust him.'
'That's no reason. That's no reason at all. You said yourself it was a mistake to attribute human qualities to a machine. How can you trust it?'
He shrugged. 'It's not enough reason for me anyway. I have to do something for myself.'
Beech clicked his mouse and captured Black Rook with his King.
'I can understand that,' he said.
'Please. Change your mind. Come with us.'