With a long drawn exclamation of ecstasy, Poirot led the way back to the morning-room.

“See you, one should not ask for outside proof⁠—no, reason should be enough. But the flesh is weak, it is consolation to find that one is on the right track. Ah, my friend, I am like a giant refreshed. I run! I leap!”

And, in very truth, run and leap he did, gambolling wildly down the stretch of lawn outside the long window.

“What is your remarkable little friend doing?” asked a voice behind me, and I turned to find Mary Cavendish at my elbow. She smiled, and so did I. “What is it all about?”

“Really, I can’t tell you. He asked Dorcas some question about a bell, and appeared so delighted with her answer that he is capering about as you see!”

Mary laughed.

“How ridiculous! He’s going out of the gate. Isn’t he coming back today?”