was in the habit of drinking a cup of coco in the middle of the night. Could the strychnine have been administered in that?”
“No, I myself took a sample of the coco remaining in the saucepan and had it analysed. There was no strychnine present.”
I heard Poirot chuckle softly beside me.
“How did you know?” I whispered.
“Listen.”
“I should say”—the doctor was continuing—“that I would have been considerably surprised at any other result.”
“Why?”
“Simply because strychnine has an unusually bitter
With a nervous giggle, Annie took herself creakingly out of the room. My pent-up excitement burst forth.
“Poirot,” I cried, “I congratulate you! This is a great discovery.”
“What is a great discovery?”
“Why, that it was the coco and not the coffee that was poisoned. That explains everything! Of