“The what?”

“Think of it as an address, the name of the system this little transmitter is looking for. You might think it was just gibberish, but if you look closely the numbers actually tell you more. This thing had to have some kind of onboard locator system, probably linked to a satellite. Old military stuff. So what you’re seeing are actually coordinates on a grid, and not anything fancy. It’s just longitude and latitude. Thirty-seven degrees, fifty-six minutes north by one hundred seven degrees, forty-nine minutes west. So, we go to the map-”

Michael cleared the screen again, tapping briskly at the keys. A new image sprang into view. It took Peter a moment to understand what he was seeing, that it was a map of the North American continent.

“We type in the coordinates, like so… ”

A grid of black lines appeared over the map, breaking it into squares. With a flourish, Michael lifted his fingers from the keyboard and slapped Enter. A bright yellow dot appeared.

“… and there we have it. Southwestern Colorado. A town called Telluride.”

The name meant nothing to Peter. “So?”

“Colorado, Peter. The heart of the CQZ.”

“What’s the CQZ?”

Michael sighed impatiently. “You really need to brush up on your history. The Central Quarantine Zone. It’s where the epidemic began. The first virals all came out of Colorado.”

Peter felt like he was being dragged from a runaway horse. “Please, just slow down. Are you telling me she comes from there?”

Michael nodded. “Basically, yeah. The transmitter was short-range, so she had to be within a few clicks when they put it in. The real question is why.”

“Flyers. You’re asking like I know?”

His friend paused, searching Peter’s face for a long moment. “Let me ask you something. Have you ever really thought about what the virals are? Not just what they do, Peter. What they are.”

“A being without a soul?”

Michael nodded. “Right, that’s what everybody says. But what if there’s more to it? This girl, Amy, she’s not a viral. We’d all be dead if she were. But you’ve seen the way she heals, and she survived out there. You said it yourself, she protected you. And how do you explain the fact that she’s almost a hundred years old but doesn’t look a day over, what, fourteen? The Army did something to her. I don’t know how they did it, but they did. This transmitter was broadcasting on a military frequency. Maybe she was infected and they did something to her that made her normal again.” He paused once more, his eyes fixed on Peter’s face. “Maybe she’s the cure.”

“That’s… a big leap.”

“I’m not so sure.” Michael lifted in his chair to remove a book from the shelf above his terminal. “So I went back through the old logbook to see if we had ever picked up a signal from those coordinates. Just a hunch. And sure enough, we did. Eighty years ago, we picked up a beacon broadcasting these same coordinates. Military distress frequency, old-style Morse. But then there’s this notation.”

Michael opened the log to the page he’d marked. He placed the book in Peter’s lap, pointing at the words written there.

If you found her, bring her here.

“And here’s the clincher,” Michael went on. “It’s still transmitting. That’s what took me so long. I had to run a cable up the Wall to get a decent signal.”

Peter lifted his eyes from the page. Michael was still looking at him with the same intense gaze.

“It’s what?”

“Transmitting. Those same words. ‘If you found her, bring her here.’”

Peter felt a kind of dizziness, gathering at the fringes of his brain. “How could it be transmitting?”

“Because somebody’s there, Peter. Don’t you get it?” He smiled victoriously. “Ninety-three years. That’s year zero, the start of the outbreak. That’s what I’m telling you. Ninety-three years ago, in the spring of the year zero, in Telluride, Colorado, somebody put a nuclear-powered transmitter inside a six-year-old-girl’s neck. Who’s still alive and sitting in quarantine, like she walked straight out of the Time Before. And for ninety-three years, whoever did this has been asking for her back.”

FORTY

It was nearly half-night, no one about, everyone but the Watch inside because of the curfew. All seemed quiet on the Wall. During the intervening hours, Peter had done all he could to get a handle on the situation. He hadn’t reported for duty, and nobody had come looking for him, though probably they wouldn’t have thought to look in the Lighthouse or in the FEMA trailer, from which he had scouted the lockup. With the coming of night, and the Watch so depleted, Ian had posted only a single guard there, Galen Strauss. But Peter doubted Sam and the others would try anything before first light. By then he planned to be gone.

The Infirmary was under heavier guard-a pair of Watchers, one in the front and one in the rear. Dale had been moved up to the Wall, so there was no way Peter could get inside, but Sara was still free to come and go. He had hidden in the shrubbery at the base of the courtyard wall and waited for her to appear. A long time passed before the door opened and she stepped onto the porch. She spoke briefly to the Watcher on duty, Ben Chou, before descending the stairs and making her way down the path, evidently headed to her house to get something to eat. Peter followed her at a discreet distance until he was sure they were out of sight and made his quick approach.

“Come with me now,” he said.

He led her to the Lighthouse, where Michael and Elton were waiting. Moving through the same explanation he had given Peter, Michael told his sister what he knew. When he came to the part about the signal and showed her the words in the logbook, Sara took it from his hands and examined it.

“Okay.”

Michael frowned. “What do you mean ‘okay’?”

“Michael, it’s not that I doubt you. I’ve known you too long. But what are we supposed to do with this information? Colorado is, what, a thousand kilometers from here?”

“About sixteen hundred,” Michael said. “Give or take.”

“So how are we supposed to get there?”

Michael paused. He glanced past his sister to Elton, who nodded.

“The real problem is what happens if we don’t.”

And that was when Michael told them about the batteries.

Peter absorbed this news with a strange detachment, a feeling of inevitability. Of course the batteries were failing; the batteries had been failing all along. He could feel it in everything that had happened; he felt it in the core of him, as if he’d always known. Like the girl. This girl, Amy, the Girl from Nowhere. That she had arrived in their midst when the batteries were failing was more than coincidence. All that remained was for him was to act upon this knowledge.

He became aware that no one had spoken for a while. “Who else knows about this?” he asked Michael.

“Just us.” He hesitated. “And your brother.”

“You told Theo?”

Michael nodded. “I always wished I hadn’t. He was the one who told me not to tell anyone. Which I didn’t, until now.”

Of course, Peter was thinking. Of course Theo had known.

“I think he didn’t want people to be afraid,” Michael explained. “As long as there wasn’t anything we could do.”

“But you think there is.”

Michael paused to rub his eyes with the tips of his fingers. Peter could see the long hours catching up with him. None of them had slept at all.

“You know what I’d do, Peter. The signal’s probably automated. But if the Army’s still out there, I don’t see how we can just do nothing. If she did what you said at the mall, maybe she could protect us.”

Peter turned his face toward Sara. After what Michael had just told them, he was surprised to find her so composed, her face revealing no emotion. But she was a nurse; Peter knew that toughness.