Julian winced. “I kept his things. They’re in one of the storerooms on the ground floor.”

“Good.” Cristina brought her hands together sharply. “He’ll need them. And more. Clothes to replace the ones he’s wearing. Anything of his that was kept. Anything that’ll seem familiar. Photos, or things he might remember.”

“We can get those,” said Livvy. “Me and Ty.”

Ty looked relieved to have been given a specific task. He and Livvy headed downstairs, their voices a low murmur.

Julian, looking after them, exhaled raggedly—mingled tension and relief. “Thanks for giving them something to do.”

Emma reached out to squeeze Cristina’s hand. She felt oddly proud, as if she wanted to point to Cristina and say: “Look, my friend knows exactly what to do!”

“How do you know exactly what to do?” she asked aloud, and Cristina blinked.

“This is my field of study, remember,” Cristina said. “Faerie and the results of the Cold Peace. Of course the Folk have returned him to you with demands, that is part of their cruelty. He needs time to recover, to begin to recognize this world and his life again. Instead they would thrust him back into it as if it would be easy for him to be a Shadowhunter again.”

Julian leaned back against the wall beside the door. Emma could see the dark fire in his eyes, banked under his lowered eyelids. “They injured him,” he said. “Why?”

“So you would do what you did,” said Emma. “So you would get a stele.”

He cursed, short and harsh. “So I would see what they did to him, how he hates me?”

“He doesn’t hate you,” said Cristina. “He hates himself. He hates that he is Nephilim, because they would have taught that to him. Hate for hate. They are an old people and that is their idea of justice.”

“How is Mark?” It was Diana, emerging at the top of the stairs. She hurried toward them, her skirts whispering around her ankles. “Is someone in there with him?”

As Julian explained what had happened, Diana listened silently. She was buckling on her weapons belt. She had put on boots, and her hair was tied back. A leather satchel was slung over her shoulder.

“Hopefully he can rest,” she said when Julian finished. “Kieran said the journey here took them two days through Faerie, no sleep, he’s probably exhausted.”

“Kieran?” said Emma. “It’s weird calling gentry faeries by their first names. He is gentry, right?”

Diana nodded. “Kieran’s a prince of Faerie; he didn’t say so, but it’s obvious. Iarlath is from the Unseelie Court, not a prince, but some sort of Court member. You can tell.”

Julian glanced toward the door of his brother’s room. “I should go back in there—”

“No,” Diana said. “You and Emma are going to Malcolm Fade’s.” She fished into her satchel and came out with the faerie documents that Kieran had given to her earlier. Up close Emma could see that they were two sheets of parchment, thin as onionskin. The ink on them looked as if it had been carved there. “Take this to him. See what he can make of it.”

“Now?” Emma said. “But—”

“Now,” said Diana flatly. “The Folk have given you—given us— three weeks. Three weeks with Mark to solve this. Then they take him back.”

“Three weeks?” Julian echoed. “That’s not nearly enough time.”

“I could go with them,” Cristina said.

“I need you here, Cristina,” said Diana. “Someone has to watch over Mark, and it can’t be one of the children. And it can’t be me. I have to go.”

“Go where?” Emma demanded.

But Diana only shook her head, unforthcoming. It was a familiar wall. Emma had crashed against it more than once. “It’s important,” was all Diana said. “You’ll have to trust me.”

Julian said nothing. Emma suspected Diana’s aloofness bothered him as much, if not more, than it bothered her, but he never showed it.

“But this changes things,” Emma said, and she fought down the emotion in her voice, the spark of relief, even triumph, that she knew she shouldn’t feel. “Because of Mark. Because of Mark, you’re willing to let us try to find out who did this.”

“Yes.” For the first time since she’d come into the hallway, Diana looked directly at Emma. “You must be pleased,” she said. “You got exactly what you wanted. We’ve got no choice now. We’ll have to investigate these killings, and we’ll have to do it without the knowledge of the Clave.”

“I didn’t make this happen,” Emma protested.

“No situation in which you have no choice is a good one, Emma,” Diana said. “Which you will eventually learn. I only hope it isn’t too late. You might think this is a good thing that’s happened, but I can assure you it isn’t.” She turned away from Emma, fixing her attention on Julian. “As you well know, Julian, this is an illegal investigation. The Cold Peace forbids cooperation with the Fair Folk, and certainly forbids what amounts to working for them, no matter the inducement. It’s to our advantage to figure this out as quickly and cleanly as we can, so the Clave has as little opportunity as possible to find out what we’re doing.”