“Yes indeed! You were in a towering rage. Do you remember? It was when you discovered that the lock of the despatch-case in Mrs. Inglethorp’s bedroom had been forced. You stood by the mantelpiece, twiddling the things on it in your usual fashion, and your hand shook like a leaf! I must say⁠—”

But I stopped suddenly. For Poirot, uttering a hoarse and inarticulate cry, again annihilated his masterpiece of cards, and putting his hands over his eyes swayed backwards and forwards, apparently suffering the keenest agony.

“Good heavens, Poirot!” I cried. “What is the matter? Are you taken ill?”

“No, no,” he gasped. “It is⁠—it is⁠—that I have an idea!”

“Oh!” I exclaimed, much relieved. “One of your ‘little ideas’?”