'This is not the time for sticking to the rules, Bradshaw – my partner's in there!'

'This is exactly the time we should stick to the rules, Snell.'

They stared at one another.

'Then I'll go alone,' replied Snell with finality, pulling the mask down over his face and releasing the safety catch on his automatic. Havisham caught his elbow as she rummaged in her TravelBook for her own mask. 'We go together or not at all, Akrid.'

I found the correct page for the mask, pulled it out of its slot and put it on under the Eject-O-Hat. Miss Havisham pinned a carrot to my jacket, too.

'A carrot is the best litmus test for the mispeling vyrus,' she said, helping Bradshaw on with his mask. 'As soon as the carrot comes into contact with the vyrus, it will start to mispel into parrot. You need to be out before it can talk. We have a saying: "When you can hear Polly, use the brolly."'

She tapped the toggle of the Eject-O-Hat. X

'Understand?'

I nodded.

'Good. Bradshaw, lead the way!'

We stepped carefully across the door with its mispeled hinges and into the lab, which was in a state of chaotic disorder. Mispeling was merely an annoyance to readers in the real world – but inside fiction it was a menace. The mispeling was the effect of sense distortion, not the cause – once the internal meaning of a word started to break down then the mispeling arose as a consequence of this. Unmispeling the word at TGC might work if the vyrus hadn't taken a strong hold but usually it was pointless; like making the beds in a burning house.

The interior of the laboratory was heavily disrupted. On the far wall the shelves were filled with a noisy company of feather-bound rooks; we stepped forward on to the fattened tarpit only to see that the imposing table in the centre of the room was now an enormous label. The glass apparatus had become grass asparagus, and worst of all, Mathias the talking horse was simply a large model house — like a doll's house but much more detailed. Miss Havisham looked at me and pointed to her carrot. Already it was starting to change colour – I could see tinges of red, yellow and blue.

'Careful,' said Snell, 'look!'

On the floor next to more shards of broken grass was a small layer of the same purple mist I had seen the last time I was here. The area of the floor touched by the vyrus was constantly changing meaning, texture, colour and appearance.

'Where was the minotaur kept?' asked Havisham, her carrot beginning to sprout a small beak.