I had almost shouted it. My voice sounded strange, even to me. They fell silent, eyeing one another sideways, not understanding. Vortigen said: “The old man? They said he was a spy.”

“He was a magician, and my master,” I said. “And he taught me, Vortigern.”

“What did he teach you?”

I smiled. “Enough. Enough to know that these men are fools and charlatans. Very well, Vortigern. Take me up to the crag and bring your knives with you, you and your soothsayers. Show me this fortress, these cracking walls, and see if I cannot tell you, better than they, why your fort will not stand. ‘No man’s child’!” I said it with contempt. “These are the things they conjure up, these foolish old men, when they can think of nothing else. Does it not occur to you, King, that the son of a spirit of darkness might have a magic that outstrips the spells of these old fools? If what they say is true, and if my blood will make these stones stand, then why did they watch them fall not once, not twice, but four times, before they could tell you what to do? Let me but see the place once, and I will tell you. By the God of gods, Vortigern, if my dead blood could make your fortress stand, how much better could my living body serve you?”

“Sorcery! Sorcery! Don’t listen to him! What does a lad like him know of such matters?” Maugan began to shout, and the priests to cluck and chatter. But the old warrior said gruffly and sharply: “Let him try. There’s no harm in that. Help you must have, Vortigern, be it from god or devil. Let him try, I say.” And round the hall I heard the echoes from the fighting men, who would have no cause to love the priests: “Let him try.”

Vortigern frowned in indecision, glancing from Maugan to the warriors, then at the grey arches where the rain fell. “Now?”

“Better now,” they said. “There is not much time.”

“No,” I said clearly, “there is not much time.” Silence again, all eyes on me. “The rain is heavy, Vortigern. What kind of king is it whose fortress is knocked down by a shower of rain? You will find your walls fallen yet again. This comes of building in the dark, with blind men for counsellors. Now take me to the top of your crag, and I will tell you why your walls have fallen. And if you listen to me instead of to these priests of darkness, I will tell you how to rebuild your stronghold in the light.”

As I spoke, like the turning off of a tap, the downpour stopped. In the sudden quiet, men’s mouths gaped. Even Maugan was dumb. Then like the pulling aside of a dark curtain, the sun came out.