“That is merely a guarantee of our good faith,” he said. “Ten times that amount will be paid you.”

“Good God,” I cried, springing up, “you dare to think⁠—”

“Sit down, Hastings,” said Poirot autocratically. “Subdue your so beautiful and honest nature and sit down. To you, monsieur, I will say this. What is to prevent me ringing up the police and giving you into their custody, whilst my friend here prevents you from escaping?”

“By all means do so if you think it advisable,” said our visitor calmly.

“Oh! look here, Poirot,” I cried. “I can’t stand this. Ring up the police and have done with it.”

Rising swiftly, I strode to the door and stood with my back against it.

“It seems the obvious course,” murmured Poirot, as though debating with himself.