by the story of Annie about some ‘salt’ on the tray of coco which she took every night to Mrs. Inglethorp’s room. I accordingly secured a sample of that coco, and sent it to be analysed.”
“But that had already been done by Dr. Bauerstein,” said Lawrence quickly.
“Not exactly. The analyst was asked by him to report whether strychnine was, or was not, present. He did not have it tested, as I did, for a narcotic.”
“For a narcotic?”
“Yes. Here is the analyst’s report. Mrs. Cavendish administered
I hesitated. To tell the truth, an idea, wild and extravagant in itself, had once or twice that morning flashed through my brain. I had rejected it as absurd, nevertheless it persisted.
“You couldn’t call it a suspicion,” I murmured. “It’s so utterly foolish.”
“Come now,” urged Poirot encouragingly.