‘I know,’ Isolde replied, ‘but I can’t risk walking in my sleep. I can’t bear it. I will not have this madness descend on me. Ishraq, I won’t walk in the night, scream out in dreams. If I go mad, if I really go mad, you will have to kill me. I cannot bear it.’

Ishraq leaned down and put her brown cheek to the other girl’s pale face. ‘I never would. I never could. We will fight this, and we will defeat them.’

‘What about the inquirer?’

‘He is talking to all of the sisters, he is learning far too much. His report will destroy this abbey, will ruin your good name. Everything they tell him blames us, names you, dates the start of the troubles to the time when we arrived. We have to get hold of him. We have to stop him.’

‘Stop him?’ she asked.

Ishraq nodded, her face grim. ‘We have to stop him, one way or another. We have to do whatever it takes to stop him.’

The moon was up, but it was a half moon hidden behind scudding clouds and shedding little light as Luca went quietly across the cobbled yard. He saw a shadowy figure step out of the darkness: Freize. In his hand he had the key ready, oiled to make no sound, and slid it quietly in the lock. The door creaked as Luca pushed it open and both men froze at the sound, but no-one stirred. All the narrow windows that faced over the courtyard were dark, apart from the window of the Lady Abbess’s house, where a candle burned, but other than that flickering light, there was no sign that she was awake.