“Isn’t that why you’re here, Armand?” Then Peter became confused, flustered. “But what time is it?” He looked around. “It can’t be that late. How’d you get here so fast?”

“By Luc you mean Luc Vachon?” said Gamache, sidestepping the question for the moment. Peter nodded.

“A follower of No Man?” asked Beauvoir from inside the cabin.

“I suppose. A student, really.”

“Did Vachon get close to the body?” Gamache asked.

“Close enough to know what had happened,” said Peter. His own eyes widened, remembering the sight.

“Close enough to take something?” asked Beauvoir. “Like the knife?”

He’d come out onto the porch and was staring at Peter. So like the Peter they’d known for years, but so unlike him too. This Peter was vague, unsteady. At sea. His hair was long and windswept and his clothing, while clean, was disheveled. It was as though he’d been turned upside down and shaken.

“I don’t know,” said Peter, “he might have gotten close enough.”

“Think,” said Gamache, his voice firm, not bullying, but commanding.

Peter seemed to steady himself. “It was all so chaotic. We were yelling at each other. Demanding to know what had happened. He wanted to move the pillow, but I stopped him. I knew enough to know nothing should be touched.”

“But was Vachon close enough to take the knife?” Beauvoir asked.

“Yes, I guess so.” Peter was getting upset now, belligerent, feeling badgered. “But I didn’t see a knife and I didn’t see him take one. He seemed as shocked and upset as me. You don’t think Luc did it?”

Gamache looked at his watch. “It’s almost noon.”

But that meant nothing to Peter.

“When did you send Vachon to call?” asked Beauvoir.

“I got here about seven, as usual. Luc came a few minutes later.”

“Five hours.” Beauvoir looked at Gamache.

“Where would Vachon have gone to call?” Gamache asked. “Tabaquen?”

“Probably. Phone service is sketchy here, but the harbormaster generally has a good line. Needs it in case there’s an emergency on the water.”

“As far as we know, Luc Vachon never made that call,” said Gamache. “Either because he didn’t want to, or because he couldn’t.”

“If Luc did it, why’d he come back?” Peter demanded, his brain kicking in.

“Maybe he left the knife behind,” Gamache suggested. “Maybe he needed to make sure the professor was really dead. Maybe whoever did it sent him back, to retrieve the knife or other evidence.”

“‘Whoever did it’?” Peter asked. “Who do you mean?”

Gamache was looking at him. Not with the eyes of Armand, his friend. But the sharp, assessing, unrelenting gaze of the head of homicide.

“Me? You think I killed him? But why?”

“Maybe the Muse told you to do it,” Gamache suggested.

“The Muse? What’re you talking about?”

Gamache was still staring at him and Peter’s eyes widened.

“You think I’ve gone mad, don’t you? That this place has driven me insane.”

“Not just the place,” said Gamache. “But the company. Professor Norman lectured on the tenth muse. Isn’t that why you came here? To find him. And her?”

Peter flushed, either with rage or embarrassment at being caught out.

“Maybe it was all too much for you, Peter. You were lost, desperate to find a direction. Maybe the combination of Norman’s beliefs and this place was too much.” Gamache looked out at the vast, open, empty terrain. Sky and rock and water. “It would be easy to lose touch with reality.”

“And commit murder? I’m not the one who’s lost touch with reality, Armand. Yes, I can see how it might appear that I could’ve done it. And yes, Luc might’ve done it. But aren’t you forgetting something, or someone?”

“No,” said Gamache.

He wasn’t forgetting that someone was missing, besides Luc Vachon.

“Was Professor Norman surprised when Massey arrived?” Beauvoir asked.

“I think Professor Norman was beyond being surprised by anything,” said Peter. “He actually seemed pleased to see him.”

“And you left the two of them here, alone, last night,” said Beauvoir.

Peter nodded. Gamache and Beauvoir walked back into the cabin, and over to the bed.