“Thank you, monsieur. But, for the moment, I do not propose to leave Boulogne.”
“What?”
“No, we will enter this hotel here, by the quay.”
He suited the action to the word, demanded and was accorded a private room. We three followed him, puzzled and uncomprehending.
He shot a quick glance at us. “It is not so that the good detective should act, eh? I perceive your thought. He must be full of energy. He must rush to and fro. He should prostrate himself on the dusty road and seek the marks of tyres through a little glass. He must gather up the cigarette-end, the fallen match? That is your idea, is it not?”
His eyes challenged us. “But I—Hercule Poirot—tell you that it is not so! The true clues are within—here!” He tapped his forehead. “See you, I need not have left London. It would have
