Because the Thorns took the astrolabe? Etta knew carelessness could change the timeline, but not severely enough to cause travelers to be orphaned. That required intent. Focus and strategy. Taking the astrolabe from her, preventing her from destroying it—that hadn’t been enough to orphan her, but something else had. They must have used it. That was the only explanation she could think of. The Thorns had used the astrolabe and irrevocably changed—broken—some event or moment in history.

And now she was here, with the Ironwoods, and Nicholas was not.

Colors burned beneath her eyelids, blood beat between her ears, a crescendo that broke over her in a frenzy of pain and grief.

Mom.

She couldn’t think about her right now. Ironwood had sworn to kill Rose if Etta didn’t return with the astrolabe by his deadline. But…She took in a deep breath. Knowing what she did about her mother now, Etta had to believe—she had to hope—that Rose was alive, that she’d already escaped from wherever the Ironwoods had been holding her.

Now it was her turn to do the same.

She forced herself to relax the muscles bunching up her shoulders, to breathe the way Alice had taught her to when her stage fright was at its most crippling. The anxiety, the terror, they were useless to her; she breathed in, out, in, out, until they were chased out of her mind, replaced by a floating, graceful measure of notes. The music was soft, serene, filling the shadows in her thoughts with light. Vaughan Williams’s The Lark Ascending. Of course. Alice’s favorite, the one Etta had played at her instructor’s birthday, a few months before…before the Met concert. Before she’d been shot just outside the mouth of the passage.

Stop thinking. Just go.

Her guard shifted in his chair as she slowly rose, and adjusted his own position with a soft sigh. The book was on the verge of slipping out of his hands, onto his feet. She didn’t let herself wonder at how strange that was, that the guard had felt comfortable enough to take off his shoes and curl up with a book.

It doesn’t matter. There was a literal window of opportunity, and she needed to take it now.

Its frame creaked in quiet protest as Etta pushed it open further. She leaned out to assess her options, quickly recoiling back into the room.

The moon was high overhead, illuminating the bruised remains of a city. There were no streetlights, save for a few distant lanterns, but Etta had a clear view of the hills that rolled down beneath her window, of slanted, winding streets that disappeared beneath heaping mounds of brick and wood, only to reappear again, scorched.

The air held a hint of smoke and salt. An insistent wind carried thick fog up from a distant body of water, as if the city was breathing in the clean, cool mist. Skyscrapers had whole sections of themselves scooped out, their windows knocked loose like teeth. But here and there, Etta saw buildings and structures that looked freshly built—all framework and unfinished brick faces. While many streets and patches of ground had been cleared, the sheer scale of the destruction reminded her of what she had seen in wartime London with Nicholas.

She had the ghost of an idea where she was, but it fled before she could grab onto it. The when seemed more obvious. The furniture, the expensive draperies and bedding, the hideous Victorian-doll-like nightgown someone had stuffed her into, the destruction…late nineteenth century? Early twentieth?

Well, she thought, hoping to prop up her spirits a bit, the only way out is through.

She was on the second or third story of a house, though it was difficult to tell by the steep angle of the road below. This side of the house was covered in an intricate puzzle of wood scaffolding that extended from the roof above her to where the long beams were anchored on the ground.

She stuck an arm out, testing the distance between her and the nearest support. Her fingers easily folded around the rough wood, and before she could question the decision, before she could consider all the reasons it was a very, very terrible idea, Etta climbed up onto the window frame and swung her legs around first to its ledge, then toward the nearest horizontal plank of scaffolding.

“This is insane,” she muttered, waiting to make sure the wood could at least hold some of her weight. How many times growing up had she seen news reports of scaffolding collapsing in New York City?

Eight. Exactly eight.

The blood drained from her head all at once, and she was forced to wait, heart beating an impatient rhythm, until her balance steadied again. Etta held her breath, arms trembling from the strain, as she scooted off the window ledge and onto the wood plank in front of her.

It didn’t so much as groan.

There, she thought, good job. Keep going.

In some ways it was like heading down a strangely constructed ladder. Every now and then, Etta felt the structure tremble with her added weight, and some gaps between the planks and beams were almost too wide to reach across. But she gained confidence with each step, even as the wind plucked at her back, even as she realized she had no idea where to go once she reached the ground.

The bay windows on the floor below were longer and jutted out from the house. More dangerous yet, the glass was glowing, light spilling out onto the scaffolding. Etta crawled forward to peer through her cover of darkness; if the room was occupied, she’d have to move closer to the edge of the scaffolding to avoid being seen by its occupants. But first she wanted to know who, exactly, was in the building—the enormous house—and why they’d taken her in.

The room was larger than the one she’d just climbed out of, and lined with stately, dark wood shelves that contained row upon row of books. There was a desk stationed in front of the window and a large broad-backed chair turned away from her, but the room was otherwise empty.