Arthur himself oversaw the search of Pellenore’s dungeoncell. “There must be a hidden passage. There must.” But none was found for the longest time. Then by chance Arthur sat on the stone ledge, leaned back against the wall and felt the stone shift slightly. No one could find a latch or spring mechanism, but when main force was applied, the stone swung back, revealing a long, dark-and perfectly empty-corridor.

It was thirty feet long and ended in a blank stone wall. More force was applied, but these stones proved unyielding. Worse yet, there was no sign anyone had been there for years; the floor was littered with dirt and debris and cobwebs hung undisturbed. There were no footprints, no hand-prints, nothing.

Merlin couldn’t resist observing that there might be other passages as well, that this might not be the one Pellenore had used in his escape. Arthur fumed.

But over the following days, Pellenore was seen, or rather evidence of his presence was seen. Food disappeared mysteriously from the kitchen. Blankets and clothing were taken from knights’ rooms. A maid, tidying Accolon’s chambers, shrieked in terror and ran when a man emerged from a wall there. He took a pillow and vanished again. No one knew where the mad king would appear next, and given his supposedly homicidal bent, everyone was on edge.

“I want him found.” Arthur addressed a gathering of his officers and knights. “I want him found, do you all understand that? Midwinter Court will be happening soon. I’ll be sending out heralds to summon everyone. We can’t very well have Pellenore leaping out of walls, terrifying our visitors. Or worse yet, slaughtering them.”

And so the hunt continued-and continued to be fruitless.

Merlin watched it all, deeply entertained. “Wanting to isolate Pellenore and incapacitate him, Arthur has done the reverse. ”

Nimue was anxious, like everyone else in Camelot. “Has it occurred to you that he may be right? That Pellenore may actually have killed the twins? That whatever Mark is up to may be unconnected?”

“And I suppose you think the old man’s dragons and griffins and whatnot are real?”

“No, of course not. But he thinks they’re real. He could easily have killed the boys, for whatever mad reason, then convinced himself it was really his imaginary beasts who did it.”

“Better still,” Brit added, quite diverted by it all, “they may actually exist.”

“Dragons that kill with swords? Of course.” He snorted.

“I know you, Merlin.” She scowled at him. “I know the way your mind works. You’ve never liked the military. You want Mark to be the murderer.”

“I feel guilty about all of the wars I set Arthur on, yes. When I rigged the-when he pulled Excalibur from the stone, I expected him to become king peacefully. The idea was to use people’s superstition against them, and for their own good. Instead there was nationwide warfare. Death and bloodshed on a vast scale. Do you really think I think framing Mark for the murders would atone for that? If you do know the way my mind works, you must know better than that.”

“I know there’s a murderer loose and we’re all in danger. Wouldn’t you say so, Colin?” Since their journey to Cornwall together, Brit and Nimue had found a measure of respect for one another; at least the active suspicion and hostility between them had abated.

“I don’t know what to think,” Nimue said. “I’m still new here. Merlin knows everyone so much better than I do. But-”

“But what?” Merlin was losing his patience.

“But-can we afford to take the chance?”

Suddenly, his face lit up with a broad smile. “Of course! That’s it!”

It caught Brit off guard. “You know where he’s hiding?”

“No. But I’ve suddenly realized how to flush the real killer out of secrecy.”

“How?”

“Never you mind. I’ll explain in good time. But it relates to what we’ve been talking about.”

Brit frowned. “I can’t stand you when you’re smug and cryptic.”

“I know, I know.”

“Then stop it. Explain yourself.”

“Not now. I have to find the king.”

Merlin rushed through the castle as quickly as he could on his injured leg. Just as he reached the foot of Arthur’s tower, he met Greffys. “Is he up there?”

“No. He’s in the Great Hall with the heralds.”

“Good. I only hope I can catch him in time.”

Together they headed for the hall, Merlin limping behind the boy. People gaped as the two hurried along corridor after corridor. No one could remember seeing Merlin in such a hurry, wounded leg and all. His cane tapped the stones like a woodpecker.

They found Arthur sitting on a table in the Great Hall with a plate of honey cakes in front of him. On the other side of the hall two dozen of his heralds had gathered and were waiting for him to finish his treat and address them.

“Merlin, Greffys, have one of these. The cooks are getting better.”

“So am I, Arthur.” Merlin beamed. “I’ve found it.”

“Found what? What the devil are you talking about?”

Merlin looked around and lowered his voice. “The stone-I’ve found the key to unleashing its power.”

The king gaped at him. “You’re joking.”

“No.”

“Did Morgan tell you?”

“No, Arthur, I found it myself. I’m not called the greatest scholar in England for nothing, you know.”

“What is it, then? Tell me.”

“Not yet. I still have to track down some details. But I’m glad I’ve caught you before you sent the heralds out.”

“You want this announced?”

“To everyone. I want the whole country to know the power the Stone of Bran has given us.”

“This doesn’t sound like you, Merlin. What power?”

“The power,” he said slowly and carefully, “of life and death.”

Arthur fell silent for a moment. “It is that powerful?”

Merlin nodded gravely, in his best “sage” manner.

“You’re right. All England must know of this. This will make us the greatest power in Europe.”

“If not in the entire world.” Merlin was pleased at the way this was going. If Arthur believed his tale, then it seemed likely that most everyone would. “Have the heralds announce it. Tell them I shall demonstrate at Midwinter Court. Everyone in England will see the truth then.”

“Excellent work, Merlin.”

“And it might be wise to have military escorts accompany the heralds, at least the ones who are summoning Morgan, Guenevere and Mark. Just to make certain they accept your gracious invitation.”

Arthur narrowed his eyes. “We know who did the murders, remember?”

“Yes, of course, Arthur. I simply want to make sure, that’s all.”

“You’re up to something. But I’ll do it.”

“Oh, and something else occurred to me.”

“Yes? What?”

“Have you given much thought to the entertainment for court?”

“No, I can’t honestly say that I have. Why?”

“While the heralds are out, have them look for Samuel Gall’s company of actors. They are the best in the country. Have them summoned here to perform for the assembled nobles.”

Arthur bit into another cake. “I will. But it isn’t like you to worry over performers. What’s back of this?”

“Why, Arthur.” He was all innocence. “I simply want your court to be memorable, that is all.”