Toph thinks about that for a second. She can tell through his body signals trembling into the ground that he's not trying to hide something. He really is that morose and quiet. Kind of comes off as a wussy sort of kid to her... but she won't judge if he's really that unhappy.

Ponder ponder. Asking more about the letter feels a little nosy in this situation. Can't she help somehow?

"I'll tell you what," she starts, standing up again from the dirt. "I'll point you to every last scrap of paper on the ground around here. And we'll check every one to see if it's a page you're missing. How does that sound?"