"And the second suggestion? That Mrs. Inglethorp may have inadvertently taken an overdose?"

"Three, or even four doses, would not have resulted in death. Mrs. Inglethorp always had an extra large amount of medicine made up at a time, as she dealt with Coot's, the Cash Chemists in Tadminster. She would have had to take very nearly the whole bottle to account for the amount of strychnine found at the post-mortem."

"Then you consider that we may dismiss the tonic as not being in any way instrumental in causing her death?"

"Certainly. The supposition is ridiculous."

The same juryman who had interrupted before here suggested that the chemist who made up the medicine might have committed an error.

"That, of course, is always possible," replied the doctor.

But Dorcas, who was the next witness called, dispelled even that possibility. The medicine had not been newly made up. On the contrary, Mrs. Inglethorp had taken the last dose on the day of her death.

So the question of the tonic was finally abandoned, and the Coroner proceeded with his task. Having elicited from Dorcas how she had been awakened by the violent ringing of her mistress's bell, and had subsequently roused the household, he passed to the subject of the quarrel on the preceding afternoon.

Dorcas's evidence on this point was substantially what Poirot and I had already heard, so I will not repeat it here.

The next witness was Mary Cavendish. She stood very upright, and spoke in a low, clear, and perfectly composed voice. In answer to the Coroner's question, she told how, her alarm clock having aroused her at 4.30 as usual, she was dressing, when she was startled by the sound of something heavy falling.

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"That would have been the table by the bed?" commented the Coroner.

"I opened my door," continued Mary, "and listened. In a few minutes a bell rang violently. Dorcas came running down and woke my husband, and we all went to my mother-in-law's room, but it was locked----"

The Coroner interrupted her.

"I really do not think we need trouble you further on that point. We know all that can be known of the subsequent happenings. But I should be obliged if you would tell us all you overheard of the quarrel the day before."

"I?"

There was a faint insolence in her voice. She raised her hand and adjusted the ruffle of lace at her neck, turning her head a little as she did so. And quite spontaneously the thought flashed across my mind: "She is gaining time!"




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