“This is my house,” Aristedes said, his expression never changing. “I am the master here, and my will is—”

Butters appeared behind Aristedes, from around an upended vat of some kind, and swung three feet of lead pipe into the side of the sorcerer’s knee.

There was a sharp, clear crack as bone and cartilage snapped, and Aristedes screamed and went down.

“That sound you just heard,” Butters said, his voice tight with fear and adrenaline, “was your lateral collateral ligament and anterior cruciate ligament tearing free of the joint. It’s also possible that your patella or tibia was fractured.”

Aristedes just lay there in pain, gasping through clenched teeth. A line of spittle drooled out of his mouth.

Butters hefted the lead pipe like a batter at the plate. “Get rid of the knife, or I start on your cranium.”

Aristedes kept on gasping but didn’t look up. He tossed the creepy knife away.

“The one in your pocket, too,” Butters said.

The sorcerer gave him a look of pure hatred. Then he tossed away the knife he’d appropriated from Daniel.

“Sit tight, Daniel,” Butters called. “I’ll be with you in just a second.”

“ ’M fine,” Daniel groaned from the ground. He didn’t sound fine. But as I watched, I saw him winding pieces of the slashed cloak around the wound in his right arm, binding them closed and slowing the bleeding. Tough kid, and thinking under pressure.

Butters focused on Aristedes. “I don’t want to hurt you,” he said. “I want to help you. Your knee has been destroyed. You will never walk again if you don’t get medical attention. I’ll take you to a hospital.”

“What do you want?” Aristedes growled.

“The priest. Fitz. These kids.” He bounced the lead pipe against his own shoulder a couple of times. “And this really isn’t a negotiation.”

“Yes!” I said, clenching my fist. “You go, Butters!”

Aristedes eyed Butters for a moment more. Then he sagged and let out a soft groan of pain.

Oh, crap.

“You win,” the sorcerer said. “Just… please… help me.”

“Straighten it out,” Butters said, never quite looking at the man. “Lie back and leave it straight.”

Aristedes fumbled with his leg and let out another, higher-pitched moan of pain.

Butters flinched at the sound and his eyes were tortured. In a sudden flash of insight, I realized why he cut up corpses for a living instead of treating live patients.

Butters couldn’t handle seeing people in pain.

That was what he’d always meant when he said that he wasn’t a real doctor, when he said that treating living patients was messy and disturbing compared to extracting individual organs and cataloging them in autopsies. Dead people were just a pile of meat and bones. They were beyond all suffering.

A physician needs a certain level of professional detachment if he is going to best serve his patients, and Butters just… didn’t have it. The little guy couldn’t bring himself not to feel something for the people he worked with. So he had sought a career where he practiced medicine without trying to heal anyone—without involving himself with actual patients.