‘This morning,’ Igraine said, *I saw a stag with only one antler. It’s a bad omen, Derfel.’

‘We Christians,’ I said, ‘do not believe in omens.’

‘But I see you touching that nail in your desk,’ she said.

‘We are not always good Christians.’

She paused. ‘I’m worried about the birth.’

‘We are all praying for you,’ I said, and knew it was an inadequate response. But I had done more than just pray in our monastery’s small chapel. I had found an eagle stone, scratched her name on its surface and buried it beside an ash tree. If Sansum knew I had made that ancient charm he would forget about his need for Brochvael’s protection and have Saint Tudwal beat me bloody for a month. But then, if the saint knew I was writing this tale of Arthur he would do the same.

But write it I shall and for a time it will be easy, for now comes the happy time, the years of peace. But they were also the years of encroaching darkness, but we did not see that, for we only saw the sunlight and never heeded the shadows. We thought we had beaten the shadows, and that the sun would light Britain for ever. Mynydd Baddon was Arthur’s victory, his greatest achievement, and perhaps the story should end there; but Igraine is right, life does not have tidy endings and so I must go on with this tale of Arthur, my Lord, my friend and the deliverer of Britain.

Arthur let Aelle’s men live. They laid down their spears and were distributed among the winners to be slaves. I used some of them to help dig my father’s grave. We dug it deep into that soft damp earth beside the river, and there we laid Aelle with his feet facing north and with his sword in his hand, and with the breastplate over his broken heart, his shield across his belly and the spear that had killed him alongside his corpse, and then we filled the grave and I said a prayer to Mithras while the Saxons prayed to their God of Thunder.

By evening the first funeral pyres were burning. I helped lay the corpses of my own men on their pyres, then left their comrades singing their souls to the Otherworld while I retrieved my horse and rode northwards through the long soft shadows. I rode towards the village where our women had found shelter and as I climbed into the northern hills the noise of the battlefield receded. It was the sound of fires crackling, of women weeping, of chanted elegies and of drunken men whooping savagely.