The Schwa does not cry—he is past tears—but his father isn’t. The tears roll down the man’s face. “You’re not invisible, Calvin.”

“I wish I had known sooner.”

Then the Schwa goes into his room, closes the door, and goes through the letters one by one. Some have return addresses, some don’t, but it doesn’t matter because the return address is never the same. It’s the postmark that tells the best story. Fifty letters at least . . . and almost every postmark is from a different state.

21. Why I Started Vandalizing Brooklyn

The Schwa came to school on Monday with the shoe box of letters. He showed it to me as I stood at my locker before class, but I couldn’t read his emotions. He seemed changed in a basic way. You know—it’s like how when an egg is boiled it looks the same on the outside, but it’s different on the inside. I didn’t know what I was looking at now—Schwa, or hard-boiled Schwa.

“Can I read the letters?” I asked.

He held them back. “They were written to me.”

“Well, will you at least tell me what she said?”

He thought about the question and shrugged, without looking at me. “Mostly she writes about the places she’s been. ‘Wish you were here’ kind of stuff.”

“But . . . did she say why she did it? Why she left?”

The Schwa did that weird not-looking-at-me shrug again. “She talked about it in her early letters. Said she was sorry a lot, and that it had nothing to do with me.” But he didn’t explain any further. Then he held out an envelope. “This is the most recent one. It’s about six months old.” I looked at it. The envelope had no return address. “It’s from Key West, Florida—see the postmark?”

I tried to peek at the letter, but he pulled it away from me. “I’m going to write back.”

“How can you without an address?”

The Schwa shrugged yet again. “Key West isn’t all that big. Maybe the post office knows her. And if that doesn’t work, I’ll find her some other way.”

I could have argued how unlikely that was, but who was I to shoot down his dream? If he was able to get himself a paper clip from the Titanic, and get his face slapped up on a billboard, maybe he could find his mother. The Schwa was tenacious—a word that I, for once, got right on my vocabulary test.

He took a long look at the handwriting on the letter. “Someday I want to tell her to her face what a lousy thing she did. And I want her to tell me to my face that she’s sorry.”