"Well," said the tall detective, "I shall make for the seaports. Ten to one, they've smuggled him on board a ship."

Japp shook his head. "Too obvious. The order went out at once to close all the ports." The day was just breaking as we landed. Major Norman touched Poirot on the arm. "There's a military car here waiting for you, sir."

"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 perceived 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 tires 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 been sufficient for me to sit quietly in my rooms there. All that matters is the little gray cells within. Secretly and silently they do their part, until suddenly I call for a map, and I lay my finger on a spot - so - and I say: the Prime Minister is there! And it is so! With method and logic one can accomplish anything! This frantic rushing to France was a mistake - it is playing a child's game of hide-and-seek. But now, though it may be too late, I will set to work the right way, from within. Silence, my friends, I beg of you."

And for five long hours the little man sat motionless, blinking his eyelids like a cat, his green eyes flickering and becoming steadily greener and greener. The Scotland Yard man was obviously contemptuous, Major Norman was bored and impatient, and I myself found the time pass with wearisome slowness.

Finally, I got up, and strolled as noiselessly as I could to the window. The matter was becoming a farce. I was secretly concerned for my friend. If he failed, I would have preferred him to fail in a less ridiculous manner. Out of the window I idly watched the daily leave boat, belching forth columns of smoke, as she lay alongside the quay.

Suddenly I was aroused by Poirot's voice close to my elbow.

"Mes amis, let us start!"

I turned. An extraordinary transformation had come over my friend. His eyes were flickering with excitement, his chest was swelled to the uttermost.

"I have been an imbecile, my friends! But I see daylight at last." Major Norman moved hastily to the door. "I'll order the car."

"There is no need. I shall not use it. Thank Heaven the wind has fallen."