‘But Nimue would,’ Guinevere said, ‘Nimue would slaughter every child in Britain to bring the Gods back, and Merlin would have been tempted. To get so close,’ she held a finger and thumb a coin’s breadth apart, ‘and with only Gwydre’s life between Merlin and the return of the Gods? Oh, I think he would have been tempted.’ She walked to the fire and opened her robe to let the warmth inside its folds. She wore a black gown beneath the robe and had not a single jewel in sight. Not even a ring on her fingers. ‘Merlin,’ she said softly, ‘might have felt a pang of guilt for killing Gwydre, but not Nimue. She sees no difference between this world and the Otherworld, so what does it matter to her if a child lives or dies? But the child that matters, Derfel, is the ruler’s son. To gain what is most precious you must give up what is most valuable, and what is valuable in Dumnonia is not some bastard whelp of Mordred’s. Arthur rules here, not Mordred. Nimue wanted Gwydre dead. Merlin knew that, only he hoped that the lesser deaths would suffice. But Nimue doesn’t care. One day, Derfel, she’ll assemble the Treasures again and on that day Gwydre will have his blood drained into the Cauldron.’

‘Not while Arthur lives.’

‘Not while I live either!’ she proclaimed fiercely, and then, recognizing her helplessness, she shrugged. She turned back to the window and let the brown robe drop. ‘I haven’t been a good mother,’ she said unexpectedly. I did not know what to say, so said nothing. I had never been close to Guinevere, indeed she treated me with the same rough mix of affection and derision that she might have extended to a stupid but willing dog, but now, perhaps because she had no one else with whom to share her thoughts, she offered them to me. ‘I don’t even like being a mother,’ she admitted. ‘These women, now,’ she indicated Morgan’s white-robed women who hurried through the snow between the shrine’s buildings, ‘they all worship motherhood, but they’re all as dry as husks. They weep for their Mary and tell me that only a mother can know true sadness, but who wants to know that?’ She asked the question fiercely. ‘It’s all such a waste of life!’ She was bitterly angry now. ‘Cows make good mothers and sheep suckle perfectly adequately, so what merit lies in motherhood? Any stupid girl can become a mother! It’s all that most of them are fit for! Motherhood isn’t an achievement, it’s an inevitability!’ I saw she was weeping despite her anger.

‘But it was all Arthur ever wanted me to be! A suckling cow!’

‘No, Lady,’ I said.

She turned on me angrily, her eyes bright with tears. ‘You know more than I about this, Derfel?’