Dreadful indeed

From Prince Caspian:

"I - I left it too late," said Susan, in an embarrassed voice. "I was so afraid it might be, you know -- one of our kind of bears, a talking bear." She hated killing things.

"That's the trouble of it," said Trumpkin, "when most of the beasts have gone enemy and gone dumb, but there are still some of the other kind left. You never know, and you daren't wait to see."

(...)

Lucy shuddered and nodded. When they had sat down she said: "Such a horrible idea has come into my head, Su."

"What's that?"

"Wouldn't it be dreadful if some day in our own world, at home, men started going wild inside, like the animals here, and still looked like men, so that you'd never know which were which?"