I want to know where those Uhlans come from." "All right," said Boris, wondering a little.

He went off, and Fred, as soon as he had disappeared, began to make his way very quietly, almost stealthily, indeed, toward the other end of the tunnel--the one that gave to the open air.
"He'd never have let me go if I had told him," he said to himself, feeling the need of justifying what looked like treachery, since his own conscience was accusing him.

"And I didn't lie to him.

I didn't say that I would be there when he came back.

I only hope I get out before he finds I've gone!" When he reached the opening he felt safe, and there he stopped and wrote a note to Boris, telling him what he meant to do and why he had not taken him into his confidence before.
"He's sure to find that," said Fred to himself.