drew two keys from his
pocket, and handed them to John.

"These are the keys of the two rooms. I have locked them and, in my
opinion, they would be better kept locked for the present."

The doctors then departed.

I had been turning over an idea in my head, and I felt that the moment
had now come to broach it. Yet I was a little chary of doing so. John,
I knew, had a horror of any kind of publicity, and was an easygoing
optimist, who preferred never to meet trouble half-way. It might be
difficult to convince him of the soundness of my plan. Lawrence, on the
other hand, being less conventional, and having more imagination, I felt
I might count upon as an ally. There was no doubt that the moment had
come for me to take the lead.

"John," I said, "I am going to ask you something."

"Well?"

"You remember my speaking of my friend Poirot? The Belgian who is here?
He has been a most famous detective."

"Yes."

"I want you to let me call him in--to investigate this matter."

"What--now? Before the post-mortem?"

"Yes, time is an advantage if--if--there has been foul play."

"Rubbish!" cried Lawrence angrily. "In my opinion the whole thing is
a mare's nest of Bauerstein's! Wilkins hadn't an idea of such a thing,
until Bauerstein put it into his head. But, like all specialists,
Bauerstein's got a bee in his bonnet. Poisons are his hobby, so of
course he sees them everywhere."

I confess that I was surprised by Lawrence's attitude. He was so seldom
vehement about anything.

John hesitated.

"I can't feel as you do, Lawrence," he said at last. "I'm inclined to
give Hastings a free hand, though I should prefer to wait a bit. We
don't want any unnecessary scandal."

"No, no," I cried eagerly, "you need have no fear of that. Poirot is
discretion itself."

"Very well, then, have it your own way. I leave it in your hands.
Though, if it is as we suspect, it seems a clear enough case. God
forgive me if I am wronging him!"

I looked at my watch. It was six o'clock. I determined to lose no time.

Five minutes' delay, however, I allowed myself. I spent it in ransacking
the library until I discovered a medical book which gave a description
of strychnine poisoning.

CHAPTER IV. POIROT INVESTIGATES

The house which the Belgians occupied in the village was quite close to
the park gates. One could save time by taking a narrow path through
the long grass, which cut off the detours of the winding drive. So I,
acc