‘I want a bottle of wine,’ Envy said, after a time. ‘I want to get drunk, the way the new surgeon does. What is it with surgeons, anyway? Staring at walls for half a day. Hands shaking and all the rest. Clearly, dealing with sick people is bad for the health.’ She turned over on to her belly and began inscribing patterns with a fingernail in the rough stone beneath her. ‘Drunk, all my words slurring. Staggering around, pissing on the floor. Then, I’ll turn myself into a demon of fire, and anyone who comes near me will burn to ashes, even you. And if you run, I’ll track you down. I’ll make you kneel and beg for mercy.’

Spite scratched at a flea-bite under her tunic. ‘I’ll be a demon of ice. Your fires will wink out, making you useless. Then I’ll freeze you solid, and break pieces off whenever I get bored. And I won’t kill everybody here. I’ll make them my slaves, and make them do things to each other that they’d never do, but they’d have no choice.’

The pattern Envy had scratched into the stone was giving off a faint, amber glow. She cut a nail’s line across it and the light flickered and then died. ‘Ooh, I like that. The slaves thing, I mean. I want the maids – you can have the rest, but I want the new maids. They don’t believe any of the stories. They laugh and squeal and try to frighten each other. They’re all fat and soft. After I’m done with them, they’ll never laugh again.’

A faint blue penumbra now rose from Spite. ‘You can have them. I want the rest. Setyl and Venth and Ivis and Yalad. And especially Sandalath – oh, I want her more than any of the others. That’s how we do it, Envy. With magic. Ice and fire.’

Envy crawled close to her sister. ‘Let’s plan, then.’

Above them, the footsteps paused once more. An instant later the hot air filling the crawlspace seemed to flinch, as bitter cold poured down from between the tiles. Fiercer than winter’s breath, the air burned what it touched.

Whimpering, Envy scrabbled for the chute in the wall, Spite clambering behind her.

They did not know what hid in their father’s secret chamber. But they knew enough to fear it.

* * *