The Dumpling by Coulson Kernahan

That my knowledge of his identity would come to him as a surprise, I was tolerably sure; and, in springing it thus suddenly upon him, I hoped to gather by his face, which I was watching narrowly meanwhile, whether he were moved by anger or by dismay.

The result was a fiasco, a fizzle, an abject failure. Either he was the most consummate of actors, or, as is more likely, I the most consummate of fools; for he looked at me at first with bewilderment, and then with amusement, and finally burst into a hearty laugh.