Among the Hidden
Luke almost felt he knew his relatives, though they lived hundreds of miles away. And, of course, they didn't even know he existed. The letters Mother wrote back, painstakingly, late at night, when she'd saved up enough money for a stamp, contained plenty of news of Matthew and Mark, but never once had mentioned Luke's name. (5.3)
"Oh, yeah?" the girl said. "Who are you to stop them?"
Luke raised his head as much as he could. He said the first words that came into his mind. "Population Police."
The girl let go. (14.22-25)
He was so overwhelmed with wonder at everything he'd seen at her house, everything she'd told him, that he started to say, "Did you know that Jen--"
At the last minute, he clamped his teeth shut, holding the words in. He thought he'd burst. He could feel his face flush red with the effort of keeping still. He bent his head low over his plate so nobody would see. How could he ever manage to keep Jen secret? But he had to, because if he told, they'd forbid him to go back. (16.6-7)