Will slammed the sword back into its scabbard. "I cannot take it. I will not."

Elias looked stunned. "But you must," he said. "You were his parabatai, and he loved you-"

Will held the sword back out toward Elias Carstairs, hilt-first. After a moment Elias took it, and Will turned and walked away, vanishing into the crowd.

Elias looked after him in bewilderment. "I did not intend to cause offense."

"You spoke of Jem in the past tense," said Tessa. "Jem is not with us, but he is not dead. Will-he cannot bear that Jem be thought of as lost, or forgotten."

"I did not mean to forget him," said Elias. "I meant simply that the Silent Brothers do not have emotions like we do. They do not feel as we do. If they love-"

"Jem still loves Will," Tessa said. "Whether he is a Silent Brother or not. There are things no magic can destroy, for they are magic in themselves. You never saw them together, but I did."

"I meant to give him Cortana," Elias said. "I cannot give it to James, so I thought his parabatai ought to have it."

"You mean well," Tessa said. "But, forgive my impertinence, Mr. Carstairs-do you never mean to have any children of your own?"

His eyes widened. "I had not thought-"

Tessa looked at the shimmering blade, and then at the man holding it. She could see Jem in him a little, as if she were looking at the reflection of what she loved in rippling water. That love, remembered and present, made her voice gentle when she spoke. "If you are not sure," she said, "then keep it. Keep it for your own heirs. Will would prefer that. For he does not need a sword to remember Jem by. However illustrious its lineage."

It was cold on the Institute steps, cold where Will stood without a coat or hat, looking out into the frost-dusted night. The wind blew tiny drifts of snow against his cheeks, his bare hands, and he heard, as he always did, Jem's voice in the back of his head, telling him not to be ridiculous, to get back inside before he gave himself the flu.

Winter had always seemed the purest season to Will-even the smoke and dirt of London caught by the chill, frozen hard and clean. That morning he had broken a layer of ice that had formed on his water jug, before splashing the icy fluid onto his face and shivering as he looked in the mirror, his wet hair painting his face in black stripes. First Christmas morning without Jem in six years. The purest cold, bringing the purest pain.

"Will." The voice was a whisper, of a very familiar kind. He turned his head, an image of Old Molly rising in his mind-but ghosts so rarely strayed from where they had died or were buried, and besides, what would she want with him now?

A gaze met his, level and dark. The rest of her was not so much transparent as edged by silver: the blond hair, the doll-pretty face, the white gown she had died in. Blood, red like a flower, on her chest.

"Jessamine," he said.

"Merry Christmas, Will."

His heart, which had stopped for a moment, began to beat again, the blood running fast in his veins. "Jessamine, why-what are you doing here?"

She pouted a little. "I am here because I died here," she said, her voice growing in strength. It was not unusual for a ghost to achieve a greater solidity and auditory power when they were close to a human, especially one who could hear them. She indicated the courtyard at their feet, where Will had held her in her dying moments, her blood running onto the flagstones. "Are you not pleased to see me, Will?"

"Should I be?" he said. "Jessie, usually when I see ghosts, it is because there is some unfinished business or some sorrow that holds them to this world."

She raised her head, looking up at the snow. Though it fell all around her, she was as untouched by it as if she stood under glass. "And if I had a sorrow, would you help me cure it? You never cared for me much in life."

"I did," Will said. "And I am truly sorry if I gave the impression that I cared nothing for you, or hated you, Jessamine. I think you reminded me more of myself than I wished to admit, and therefore I judged you with the same harshness I would have judged myself."

At that, she did look at him. "Why, was that straightforward honesty, Will? How you have changed." She took a step back, and he saw that her feet made no impression in the dusting of snow on the steps. "I am here because in life I did not wish to be a Shadowhunter, to guard the Nephilim. I am charged now with the guard of the Institute, for as long as it needs guarding."

"And you do not mind?" he asked. "Being here, with us, when you could have passed over ..."

She wrinkled her nose. "I did not care to pass over. So much was demanded of me in life, the Angel knows what it might be like afterward. No, I am happy here, watching you all, quiet and drifting and unseen." Her silvery hair shone in the moonlight as she inclined her head toward him. "Though you are near to driving me mad."

"I?"

"Indeed. I always said you would be a dreadful suitor, Will, and you are nigh on proving it."

"Truly?" Will said. "You have come back from death like the ghost of Old Marley, but to nag me about my romantic prospects?"

"What prospects? You've taken Tessa on so many carriage rides, I'd wager she could draw a map of London from memory, but have you proposed to her? You have not. A lady cannot propose to herself, William, and she cannot tell you she loves you if you do not state your intentions!"

Will shook his head. "Jessamine, you are incorrigible."

"I am also right," she pointed out. "What is it you are afraid of?"

"That if I do state my intentions, she will say she does not love me back, not the way she loved Jem."

"She will not love you as she loved Jem. She will love you as she loves you, Will, an entirely different person. Do you wish she had not loved Jem?"

"No, but neither do I wish to marry someone who does not love me."

"You must ask her to find that out," said Jessamine. "Life is full of risks. Death is much simpler."

"Why have I not seen you before tonight, when you have been here all this time?" he asked.

"I cannot enter the Institute yet, and when you are out in the courtyard, you are always with someone else. I have tried to go through the doors, but a sort of force prevents me. It is better than it was. At first I could go only a few steps. Now I am as you see me." She indicated her position on the stairs. "One day I shall be able to go inside."

"And when you do, you shall find that your room is as it ever was, and your dolls as well," said Will.

Jessamine smiled a smile that made Will wonder if she had always been so sad, or if death had changed her more than he had thought ghosts could be changed. Before he could speak again, though, a look of alarm crossed her face, and she vanished within a swirl of snow.

Will turned to see what had frightened her off. The doors of the Institute had opened, and Magnus had emerged. He wore an astrakhan wool greatcoat, and his tall silk hat was already being spotted by the falling snowflakes.

"I should have known I'd find you out here, doing your best to turn yourself into an icicle," Magnus said, descending the steps until he stood beside Will, looking out at the courtyard.

Will did not feel like mentioning Jessamine. Somehow he thought she would not have wanted him to. "Were you leaving the party? Or just looking for me?"

"Both," Magnus said, pulling on a pair of white gloves. "In fact, I am leaving London."

"Leaving London?" Will said in dismay. "You can't mean that."

"Why wouldn't I?" Magnus flicked a finger at an errant snowflake. It sparked blue and vanished. "I am not a Londoner, Will. I have been stopping with Woolsey for some time, but his home is not my home, and Woolsey and I wear out each other's company after not much duration."

"Where will you go?"

"New York. The New World! A new life, a new continent." Magnus threw his hands up. "I may even take your cat with me. Charlotte says he has been mourning since Jem left."

"Well, he bites everyone. You're welcome to him. Do you think he'll like New York?"

"Who knows? We will find out together. The unexpected is what keeps me from stagnating."

"Those of us who do not live forever do not like change perhaps as much as those of you who do. I am tired of losing people," Will said.

"So am I," Magnus said. "But it is as I said, isn't it? You learn to bear it."

"I have heard sometimes that men who lose an arm or a leg still feel the pain in those limbs, though they are gone," said Will. "It is like that sometimes. I can feel Jem with me, though he is gone, and it is like I am missing a part of myself."

"But you are not," Magnus said. "He is not dead, Will. He lives because you let him go. He would have stayed with you and died, if you had asked it, but you loved him enough to prefer that he live, even if that life is separate from yours. And that above all things proves that you are not Sydney Carton, Will, that yours is not the kind of love that can be redeemed only through destruction. It is what I saw in you, what I have always seen in you, what made me want to help you. That you are not despairing. That you have in you an infinite capacity for joy." He put one gloved hand under Will's chin and lifted Will's face. There were not many people Will had to raise his head to look in the eye, but Magnus was one. "Bright star," Magnus said, and his eyes were thoughtful, as if he were remembering something, or someone. "Those of you who are mortal, you burn so fiercely. And you fiercer than most, Will. I will not ever forget you."

"Nor I you," said Will. "I owe you a great deal. You broke my curse."

"You were not cursed."

"Yes, I was," Will said. "I was. Thank you, Magnus, for all you did for me. If I did not say it before, I am saying it now. Thank you."

Magnus dropped his hand. "I don't think a Shadowhunter has ever thanked me before."

Will smiled crookedly. "I would try not to become too accustomed to it. We are not a thankful sort."

"No." Magnus laughed. "No, I won't." His bright cat's eyes narrowed. "I leave you in good hands, I think, Will Herondale."

"You mean Tessa."

"I do mean Tessa. Or do you deny that she holds your heart?" Magnus had begun to descend the stairs; he paused, and looked back at Will.

"I do not," Will said. "But she will be sorry that you have left without saying good-bye to her."

"Oh," Magnus said, turning at the bottom of the steps, with a curious smile. "I don't think that will be necessary. Tell her I will see her again."

Will nodded. Magnus turned away, hands in the pockets of his coat, and began to walk toward the gates of the Institute. Will watched until his retreating figure faded into the whiteness of the falling snow.

Tessa had slipped out of the ballroom without anyone noticing. Even the usually keen-eyed Charlotte was distracted, sitting beside Henry in his wheeled chair, her hand in his, smiling at the antics of the musicians.

It did not take Tessa long to find Will. She had guessed where he would be, and she was correct-standing on the front steps of the Institute, without a coat or hat, letting the snow fall on his head and shoulders. There was a white dusting of it all over the courtyard, like icing sugar, frosting the line of carriages waiting there, the black iron gates, the flagstones upon which Jessamine had died. Will was staring intently ahead of him, as if trying to discern something through the descending flakes.

"Will," Tessa said, and he turned to look up at her. She had caught up a silk wrap, but nothing heavier, and she felt the cool sting of snowflakes against the bare skin of her neck and shoulders.

"I should have been more polite to Elias Carstairs," Will said by way of reply. He was looking up at the sky, where a pale crescent of moon darted in between thick sweeps of cloud and fog. Flakes of white snow had fallen and mixed with his black hair. His cheeks and lips were flushed with the cold. He looked more handsome than she had ever remembered him. "Instead I behaved as I would have-before."

Tessa knew what he meant. For Will there was only one before and after.

"You are allowed to have a temper," she said. "I have told you before, I do not want you to be perfect. Only to be Will."

"Who will never be perfect."

"Perfect is dull," Tessa said, descending the last step to stand beside him. "They are playing 'complete the poetic quotation' inside now. You could have made quite a showing. I do not think there is anyone there who could challenge your knowledge of literature."

"Other than you."

"I would be difficult competition indeed. Perhaps we could make ourselves a team of sorts, and divide the winnings."

"That seems bad form." Will spoke absently, tilting back his head. The snow circled whitely about them, as if they stood at the bottom of a whirlpool. "Today, when Sophie Ascended ..."

"Yes?"

"Is that something that you would have wanted?" He turned to look at her, white snowflakes caught in his dark lashes. "For yourself?"

"You know that isn't possible for me, Will. I am a warlock. Or at least, that is the closest approximation of what I am. I cannot ever be fully Nephilim."

"I know." He looked down at his hands, opening his fingers to let snowflakes settle, melting, on his palms. "But in Cadair Idris you said that you had hoped to be a Shadowhunter-that Mortmain had dashed those hopes-"

"I did feel that way at the time," she allowed. "But when I became Ithuriel-when I Changed and destroyed Mortmain-how could I hate something that allowed me to protect the ones I care about? It is not easy to be different, and even less so to be unique. But I begin to think I was never meant for an easy road."

Will laughed. "The easy road? No, not for you, my Tessa."

"Am I your Tessa?" She drew her wrap closer around herself, pretending her shiver was just the cold. "Are you bothered by what I am, Will? That I am not like you?"

The words hung between them, unspoken: There is no future for a Shadowhunter who dallies with warlocks.

Will paled. "Those things I said on the roof, so long ago-you know I did not mean them."

"I know-"

"I do not wish you other than you are, Tessa. You are what you are, and I love you. I do not love just the parts of you that meet with the Clave's approval-"

She raised her eyebrows. "You are willing to endure the rest?"