Giraud took two small objects from his pocket and laid them down on the table. We crowded round. The objects were very simple ones: the stub of a cigarette, and an unlighted match. The detective wheeled round on Poirot.

“What do you see there?” he asked.

There was something almost brutal in his tone. It made my cheeks flush. But Poirot remained unmoved. He shrugged his shoulders.

“A cigarette end, and a match.”

“And what does that tell you?”

Poirot spread out his hands.

“It tells me—nothing.”

“Ah!” said Giraud, in a satisfied voice. “You haven’t made a study of these things. That’s not an ordinary match—not in this country at least. It’s common enough in South America. Luckily it’s unlighted. I mightn’t have recognized it otherwise. Evidently one of the men threw away his cigarette end, and lit another, spilling one match out of the box as he did so.”

“And the other match?” asked Poirot.

“Which match?”