Tessa, Will, and Jem had raised James in love, and had surrounded him with love and the goodness it could produce. But they had given him no armor against the evil. They had wrapped his heart in silks and velvet, and then he had given it to Grace Blackthorn, and she had spun for it a cage of razor wire and broken glass, burned it to bits, and blown away the remains, another layer of ashes in this place of beautiful horrors.

Magnus waved a hand behind his back, then stepped away from Grace's blade, away through the magically open door.

"You will tell no one of what my mother asked of you tonight," said Grace. "Or I will ensure your destruction."

"I believe you think you could," Magnus breathed. She was terrible and brilliant, like the light shining off the edge of a razor. "Oh, and by the way? I suspect that if James Herondale had known I was coming here, he would have sent his regards."

Grace lowered her sword, nothing more. Its point rested gently on the ground. Her hand did not shake, and her lashes screened her eyes. "What do I care for James Herondale?" she asked.

"I thought you might. After all, a blade does not get to choose where it is pointed."

Grace looked up. Her eyes were still, deep pools, entirely unruffled.

"A blade does not care," she told him.

Magnus turned and made his way past tangles of black roses and undergrowth down toward the rusted gates. He looked back at the manor only once, saw the wreck of what had been grand and gracious, and saw a curtain fluttering in a window high above, and the suggestion of a face. He wondered who was watching him go.

He could warn Downworlders to steer clear of Tatiana and her endeavors. No matter what the price offered, no Downworlder would fail to listen to a warning against one of the Nephilim. Tatiana would raise no dark magic.

Magnus could do that much, but he did not see a way to help James Herondale. Grace and Tatiana might have cast a spell on him, Magnus supposed. He would not put it past either of them, but he could not see why they would. What possible role could James Herondale have to play in whatever dark plot they were hatching? More likely the boy had simply fallen prey to her charms. Love was love; there was no spell to cure a broken heart that did not also destroy that heart's capacity for love forever.

And there was no reason for Magnus to tell Will and Tessa what he had learned. James's feelings for Grace were his secret to keep. Magnus had told the boy he would never betray his secrets; he had sworn it. He had never betrayed Will's confidence, and he would not betray James's now. What good would it do Will and Tessa, to know the name of their son's pain and still have no remedy for it?

He thought once more of Camille, and how it had hurt him to learn the truth about her, how he had struggled like a man crawling over knives not to know it, and finally, with even greater pain, had been forced to accept it.

Magnus did not take such suffering lightly, but even mortals did not die of broken hearts. No matter how cruel Grace had been, he told himself, James would heal. Even though he was a Herondale.

He opened the gates with his hands, thorns scratching his flesh, and he remembered again his first sight of Grace and the feeling he'd had of being faced with a predator. She was very different from Tessa, who had always steadied and anchored Will, softened his eyes into humor and his lips to gentleness.

It would be ironic, Magnus thought, terribly and cruelly ironic, for one Herondale to be saved by love, and another Herondale damned by it.

He tried to shake off both the memory of Tessa and Will and the echo of Tatiana's condemning words. He had promised Tessa that he would return, but now he found all he wanted to do was escape. He did not want to care what Shadowhunters thought of him. He did not want to care what would become of them or their children.

He had offered help to three Shadowhunters this night. One of them had replied that he was beyond help, one had asked him to commit murder, and one had pointed a blade at him.

His relationship of mutual distant tolerance with the Whitelaws of the New York Institute seemed suddenly alluring. He was part of Downworld New York, and would have it no other way. He was glad he had left London. He discovered in himself a pang for New York and its brighter lights, and fewer broken hearts.

"Where to?" asked the driver.

Magnus thought of the ship from Southampton to New York, of standing on the deck of the boat, letting the sea air wash him clean of the musty air of London. He said, "I believe I am going home.