“Have you any knowledge of what the business in Buenos Ayres was?”
“No, monsieur, I know nothing of its nature, but Buenos Ayres is not my son’s final destination. He was going overland from there to Santiago.”
And, in unison, the magistrate and the commissary exclaimed:
“Santiago! Again Santiago!”
It was at this moment, when we were all stunned by the mention of that word, that Poirot approached Mrs. Renauld. He had been standing by the window like a man lost in a dream, and I doubt if he had fully taken in what had passed. He paused by the lady’s side with a bow.
“Pardon, madame, but may I examine your wrists.”
Though slightly surprised at the request, Mrs. Renauld held them out to him. Round each of them was a cruel red mark where the cords had bitten into the flesh. As he examined them, I fancied that a momentary flicker of excitement I had seen in his eyes disappeared.
“They must cause you great pain,” he said, and once more he looked puzzled.
But the magistrate was speaking excitedly.
“Young M. Renauld must be communicated with at once by wireless. It is vital that we should know anything he can tell us about this trip to Santiago.” He hesitated. “I hoped he might have been near at hand, so that we could have saved you pain, madame.” He paused.