"Simple and odd," said Dupin.

"Why, yes; and not exactly that, either. The fact is, we have all
been a good deal puzzled because the affair is so simple, and yet
baffles us altogether."

"Perhaps it is the very simplicity of the thing which puts you at
fault," said my friend.

"What nonsense you do talk!" replied the Prefect, laughing heartily.

"Perhaps the mystery is a little too plain," said Dupin.

"Oh, good heavens! who ever heard of such an idea?"

"A little too self-evident."

"Ha! ha! ha - ha! ha! ha! - ho! ho! ho!" roared our visiter,
profoundly amused, "oh, Dupin, you will be the death of me yet!"

"And what, after all, is the matter on hand?" I asked.

"Why, I will tell you," replied the Prefect, as he gave a long,
steady and contemplative puff, and settled himself in his chair. "I
will tell you in a few words; but, before I begin, let me caution you
that this is an affair demanding the greatest secrecy, and that I
should most probably lose the position I now hold, were it known that
I confided it to any one."