“I’ve been working on it for a few weeks,” said Square. “I made my pal memorize Rigg’s face the way it looked the last time he was here, and then shape himself to fit. I’ve been checking every reflective surface and tweaking it where it needed, and now I can pop into Rigg’s look whenever I want, and stay that way without even thinking about it.”

“Just because you can look like Rigg doesn’t mean you’re ready to—”

“I can sound like him, too,” said Square, in a voice that was identical to Rigg’s. “I have his voice inside my head, and also the way he talks.”

“Rigg has led men in battle,” said Umbo.

“He did it a first time, didn’t he?”

“The men will know you’re not really him because you don’t even know them.”

“Don’t lie to them,” said Square. “Tell them who I really am.”

“A boy from another wallfold, with a facemask like Rigg’s?”

“Who I really am,” said Square. “They all know Loaf and Leaky. They know Loaf is a great warrior. Tell them I’m their son.”

Umbo was so unprepared he couldn’t answer for a moment, and that was all the confession that a man with a facemask needed.

“Did you think that I’d never guess? I’m taller than you or Rigg, and besides, you don’t look at me the way Loaf does. I’m his height now. He’s proud of me when I put in a good day of combat training with him. And don’t kid yourself that he’s not really training me. Loaf doesn’t know how to do anything halfway.”

“I’m not confirming or denying anything,” said Umbo.

“Come on,” said Square. “You and Rigg can visit me back here two hundred years before the war, because you can both timeshape however you want. But Loaf can’t. Why does he come here, then? One of you always has to send him, and then pick him up and bring him back. I wondered about it when I was little, but when I got as tall as him, it’s the only story that made sense.”

“I told you the truth,” said Umbo.

“I believe you did. I believe you stumbled on a future where Loaf and Leaky had been killed, leaving a baby behind, and that was me. You went back and prevented their deaths, but you took me with you so I wouldn’t be wiped out in the causal shift. But Leaky didn’t want me.”

“Square, that’s not something—”