Matthias was sound asleep when the Population Police arrived at Niedler School.

It was the middle of the night, and Matthias was curled up on his narrow cot beside Percy's, in a roomful of narrow cots. It still bothered the boys that Alia couldn't sleep nearby. The cots were the most comfortable beds they'd ever had, but both boys still found themselves jerking awake several times each night, reaching out to protect a little girl who wasn't there.

But no instinct, no premonition alerted them when the Population Police trucks rolled up the school driveway. Matthias and Percy slept through the ominous rumble of the engines, the impatient rapping on the school's front door, the trample of boots in the hall. And then dozens of flashlights were suddenly blazing in their room, and Population Police officers were yelling at them, "Up! Up! Your country demands your service!"

Matthias's life before Niedler School had sometimes required instant alertness, even when awakening from deep sleep. So while the other boys in the room sat up groggily or moaned without opening their eyes—"Huh?" "Wha's happ'ning?" — only Matthias and Percy had the presence of mind to gather up their belongings, to stuff their feet into socks and shoes before the officers herded everyone out of the room.

"Think they're getting the girls, too?" Percy whispered as the press of bodies around them moved down the hall. "Don't know," Matthias said miserably. He craned his neck, trying to see over the boys in front of him, but they were all too tall. Anyhow, a line of Population Police officers stood beyond them, blocking his view of the other wing of Niedler School.

To distract himself, Matthias crammed a moth-eaten sweater over his head and pulled it down over his pajama top. The sweater was easier to wear than to carry, and it provided some small protection against the chill of the hall.