If Peter keeps smiling his face will freeze that way, and then what will the populace think? That the High King is in a good mood? Imagine their shock and distress at that idea. But Edmund likes the smiles, they're encouraging, and he offers his own back.

"Of course he does, now that I'm here he'll favor it even more, I reckon," Edmund says, his knowledge of the nature of felines relatively clear-sighted. Peter probably feeds it, which it why it stays away from the blond's room. And it's not that he expect to get lost, it just seems an inevitability if he goes out on his own.