He must be worried, to be separated from his guardian.

[She's still smiling; the friendliness seems to be genuine - and at any rate, she can help him while she decides what to do to find her way back. This is a far cry from the stern girl he knew before.]

We should look for the ball, too. He might still be near it. Shall we go together? We can split up inside the maze to look, if you think it would cover more ground more quickly.