“I must go with the others, my friend. But have great care of this gentleman. You do not know him, no? Eh bien, let me present to you, Monsieur O’Murphy!”

O’Murphy! I gaped at him open-mouthed as we started again. He was not handcuffed, but I did not fancy he would try to escape. He sat there staring in front of him as though dazed. Anyway, Norman and I would be more than a match for him.

To my surprise, we still kept a northerly route. We were not returning to London, then! I was much puzzled. Suddenly, as the car slowed down, I recognized that we were close to Hendon Aerodrome. Immediately I grasped Poirot’s idea. He proposed to reach France by aeroplane.

It was a sporting idea, but, on the face of it, impracticable. A telegram would be far quicker. Time was everything. He must leave the personal glory of rescuing the Prime Minister to others.

As we drew up, Major Norman jumped out, and a plain-clothes man took his place. He conferred with Poirot for a few minutes, and then went off briskly.

I, too, jumped out, and caught Poirot by the arm.

“I congratulate you, old fellow! They have told you the hiding-place? But, look here, you must wire to France at once. You’ll be too late if you go yourself.”

Poirot looked at me curiously for a minute or two.

“Unfortunately, my friend, there are some things that cannot be sent by telegram.”

• • • • • • •