Pardon! But I am not in the least satisfied. Jack Renauld is innocent.”

Giraud stared for a moment—then burst out laughing, tapping his head significantly with the brief remark: “Toqué!

Poirot drew himself up. A dangerous light showed in his eyes.

“M. Giraud, throughout the case your manner to me has been deliberately insulting! You need teaching a lesson. I am prepared to wager you 500 francs that I find the murderer of M. Renauld before you do. Is it agreed?”

Giraud stared helplessly at him, and murmured again:

Toqué!

“Come now,” urged Poirot, “is it agreed?”

“I have no wish to take your money from you.”

“Make your mind easy—you will not!”

“Oh, well then, I agree! You speak of my manner to you being insulting. Eh bien, once or twice, your manner has annoyed me.”