Poirot took her hand and patted it. “Put it this way,” he said. “I am always interested to see if people will speak the truth.”

“And did Parker speak the truth?”

“I rather think he did,” said Poirot thoughtfully.

A few minutes later saw us retracing our steps to the village.

“What was the point of that question about the glasses?” I asked curiously.

Poirot shrugged his shoulders. “One must say something,” he remarked. “That particular question did as well as any other.”

I stared at him.

“At any rate, my friend,” he said seriously, “I know now something I wanted to know. Let us leave it at that.”