Poirot had placed our two chairs in front of the open window which commanded a view of the village street. The fresh air blew in warm and pleasant. It was going to be a hot day.
Suddenly my attention was arrested by a weedy looking young man rushing down the street at a great pace. It was the expression on his face that was extraordinary--a curious mingling of terror and agitation.
"Look, Poirot!" I said.
He leant forward.
"Tiens!" he said. "It is Mr. Mace, from the chemist's shop. He is coming here."
The young man came to a halt before Leastways Cottage, and, after hesitating a moment, pounded vigorously at the door.
"A little minute," cried Poirot from the window. "I come."
Motioning to me to follow him, he ran swiftly down the stairs and opened the door. Mr. Mace began at once.
"Oh, Mr. Poirot, I'm sorry for the inconvenience, but I heard that you'd just come back from the Hall?"
"Yes, we have."
The young man moistened his dry lips. His face was working curiously.
"It's all over the village about old Mrs. Inglethorp dying so suddenly. They do say--" he lowered his voice cautiously-- "that it's poison?"
Poirot's face remained quite impassive.
"Only the doctors can tell us that, Mr. Mace."
"Yes, exactly--of course----" The young man hesitated, and then his agitation was too much for him. He clutched Poirot by the arm, and sank his voice to a whisper: "Just tell me this, Mr. Poirot, it isn't--it isn't strychnine, is it?"
I hardly heard what Poirot replied. Something evidently of a non-committal nature. The young man departed, and as he closed the door Poirot's eyes met mine.
"Yes," he said, nodding gravely. "He will have evidence to give at the inquest."
We went slowly upstairs again. I was opening my lips, when Poirot stopped me with a gesture of his hand.
"Not now, not now, mon ami. I have need of reflection. My mind is in some disorder--which is not well."
For about ten minutes he sat in dead silence, perfectly still, except for several expressive motions of his eyebrows, and all the time his eyes grew steadily greener. At last he heaved a deep sigh.
"It is well. The bad moment has passed. Now all is arranged and classified. One must never permit confusion. The case is not clear yet--no. For it is of the most complicated! It puzzles me. Me, Hercule Poirot! There are two facts of significance."