I said, after studying the thing
for a minute or two. "It certainly isn't a J."

"Good," replied Poirot, folding up the paper again. "I, also, am of your
way of thinking. It is an L., depend upon it!"

"Where did it come from?" I asked curiously. "Is it important?"

"Moderately so. It confirms a surmise of mine. Having deduced its
existence, I set Miss Howard to search for it, and, as you see, she has
been successful."

"What did she mean by 'On the top of the wardrobe'?"

"She meant," replied Poirot promptly, "that she found it on top of a
wardrobe."

"A funny place for a piece of brown paper," I mused.

"Not at all. The top of a wardrobe is an excellent place for brown paper
and cardboard boxes. I have kept them there myself. Neatly arranged,
there is nothing to offend the eye."

"Poirot," I asked earnestly, "have you made up your mind about this
crime?"

"Yes--that is to say, I believe I know how it was committed."

"Ah!"

"Unfortunately, I have no proof beyond my surmise, unless----" With
sudden energy, he caught me by the arm, and whirled me down the
hall, calling out in French in his excitement: "Mademoiselle Dorcas,
Mademoiselle Dorcas, un moment, s'il vous plait!"

Dorcas, quite flurried by the noise, came hurrying out of the pantry.

"My good Dorcas, I have an idea--a little idea--if it should prove
justified, what magnificent chance! Tell me, on Monday, not Tuesday,
Dorcas, but Monday, the day before the tragedy, did anything go wrong
with Mrs. Inglethorp's bell?"

Dorcas looked very surprised.

"Yes, sir, now you mention it, it did; though I don't know how you
came to hear of it. A mouse, or some such, must have nibbled the wire
through. The man came and put it right on Tuesday morning."

With a long drawn exclamation of ecstasy, Poirot led the way back to the
morning-room.

"See you, one should not ask for outside proof--no, reason should be
enough. But the flesh is weak, it is consolation to find that one is on
the right track. Ah, my friend, I am like a giant refreshed. I run! I
leap!"

And, in very truth, run and leap he did, gambolling wildly down the
stretch of lawn outside the long window.

"What is your remarkable little friend doing?" asked a voice behind me,
and I turned to find Mary Cavendish at my elbow. She smiled, and so did
I. "What is it all about?"

"Really, I can't tell you. He asked Dorcas some question about a bell,
and appeared so delighted with her answer that