The Dumpling by Coulson Kernahan

That Kate and her aunt were now aware of the identity of John Carleton with the Dumpling, I was absolutely sure. I could point back, even, to the moment when -- to the latter, at least -- the suspicion which afterwards became certainty was first aroused.

It was when I was repeating, word for word, as they had fallen from his lips, the Dumpling's expressions about the poor, that the first sign of agitation had been noticeable in the elder woman. Then, when I went on to speak of his mania in regard to his being none other than Napoleon -- then it was, as I clearly remembered, that the self-possessed and by no means impressionable Miss Clara had astonished and alarmed me by looking as if she were about to faint.