But me? Stand guard? In truth Sansum did not want me to stand guard, but rather to stand like a fool to be sacrificed while he scuttled out of the back door with Saint Tudwal in one hand and the monastery’s gold in the other. But if that is to be my fate I will not complain. I would rather die like my father with my sword in my hand, even if my arm is weak and the sword blunt. That was not the fate Merlin wanted for me, nor what Arthur wanted, but it is not a bad way for a soldier to die, and though I have been a monk these many years and a Christian even longer, in my sinful soul I am still a spearman of Mithras. And so I kissed my Hywelbane, glad to see her after all these years.

So now I shall write the tale’s ending with my sword beside me and I shall hope that I am given time to finish this tale of Arthur, my Lord, who was betrayed, reviled and, after his departure, missed like no other man was ever missed in all of Britain’s history.

I fell into a fever after my hand was struck off, and when I woke I discovered Ceinwyn sitting beside my bed. At first I did not recognize her, for her hair was short and had gone as white as ash. But it was my Ceinwyn, she was alive and her health was coming back, and when she saw the light in my eyes she leaned forward and laid her cheek on mine. I put my left arm around her and discovered I had no hand to stroke her back, only a stump bound in bloody cloth. I could feel the hand, I could even feel it itching, but there was no hand there. It had been burned. A week later I was baptized in the River Usk. Bishop Emrys performed the ceremony, and once he had dipped me in the cold water, Ceinwyn followed me down the muddy bank and insisted on being baptized as well. ‘I will go where my man goes,’ she told Bishop Emrys, and so he folded her hands on her breasts and tipped her back into the river. A choir of women sang as we were baptized and that night, dressed in white, we received the Christian bread and wine for the first time. After the mass Morgan produced a parchment on which she had written my promise to obey her husband in the Christian faith and she demanded that I sign my name.

‘I’ve already given you my word,’ I objected.

‘You will sign, Derfel,’ Morgan insisted, ‘and you will swear the oath on a crucifix as well.’