The crowd shouted that he would have it and Merlin beamed approval at them. That benevolent smile made me suspicious. One part of me sensed that he was playing a game with these folk, but even Merlin, I told myself, could not make a girl glow in darkness. I had seen her, and I wanted to believe so badly, and the memory of that lissom, shining body convinced me that the Gods had not abandoned us.

‘You must come to Mai Dun!’ Merlin said sternly. ‘You must come for as long as you are able, and you must bring food. If you have weapons, you must bring them. At Mai Dun we shall work, and the work will be long and hard, but at Samain, when the dead walk, we shall summon the Gods together. You and I!’ He paused, then held the tip of his staff towards the crowd. The black pole wavered, as if it was searching for someone in the throng, then it settled on me. ‘Lord Derfel Cadarn!’ Merlin called.

‘Lord?’ I answered, embarrassed to be singled out from the crowd.

‘You will stay, Derfel. The rest of you go now. Go to your homes, for the Gods will not come again till Samain Eve. Go to your homes, see to your fields, then come to Mai Dun. Bring axes, bring food, and prepare to see your Gods in all their glory! Now, go! Go!’

The crowd obediently went. Many stopped to touch my cloak, for I was one of the warriors who had fetched the Cauldron of Clyddno Eiddyn from its hiding place on Ynys Mon and, to the pagans at least, that made me a hero. They touched Issa too, for he was another Warrior of the Cauldron, but when the crowd was gone he waited at the gate while I went to meet Merlin. I greeted him, but he brushed aside my enquiry as to his health, asking instead if I had enjoyed the evening’s strange happenings.

‘What was it?’ I asked.

‘What was what?’ he asked innocently.

‘The girl in the dark,’ I said.

His eyes widened in mock astonishment. ‘She was here again, was she? How very interesting! Was it the girl with wings, or the one who shines? The shining girl! I have no idea who she is, Derfel. I cannot unriddle every mystery of this world. You have spent too long with Arthur and like him you believe that everything must have a commonplace explanation, but alas, the Gods rarely choose to make themselves clear. Would you be useful and carry the Cauldron inside?’

I lifted the huge Cauldron and took it into the palace’s pillared reception hall. When I had been there earlier in the day the room had been empty, but now there was a couch, a low table and four iron stands on which oil lamps stood. The young, handsome, white-armoured warrior, whose hair hung so long, smiled from the couch while Nimue, dressed in a shabby black robe, carried a lit taper to the lamps’ wicks. ‘This room was empty this afternoon,’ I said accusingly.