Let us hear what Pierre Michel has to say about this button, he said.
The Wagon Lit conductor was recalled. He looked at them inquiringly. M. Bouc cleared his throat.
Michel, he said, here is a button from your tunic. It was found in the American ladys compartment. What have you to say for yourself about it?
The conductors hand went automatically to his tunic. I have lost no button, Monsieur, he said. There must be some mistake.
That is very odd.
I cannot account for it, Monsieur. The man seemed astonished, but not in any way guilty or confused.
M. Bouc said meaningly: Owing to the circumstances in which it was found, it seems fairly certain that this button was dropped by the man who was in Mrs. Hubbards compartment last night when she rang the bell.
But, Monsieur, there was no one there. The lady must have imagined it.
She did not imagine it, Michel. The assassin of M. Ratchett passed that way-and dropped that button.
As the significance of M. Boucs words became plain to him, Pierre Michel flew into a violent state of agitation.
It is not true, Monsieur; it is not true! he cried. You are accusing me of the crime. Me, I am innocent. I am absolutely innocent! Why should I want to kill a Monsieur whom I have never seen before?
Where were you when Mrs. Hubbards bell rang?
I told you, Monsieur, in the next coach talking to my colleague.
We will send for him.
Do so, Monsieur, I implore you, do so.
The conductor of the next coach was summoned. He immediately confirmed Pierre Michels statement. He added that the conductor from the Bucharest coach had also been there. The three of them had been discussing the situation caused by the snow. They had been talking some ten minutes when Michel fancied he heard a bell. As he opened the doors connecting the two coaches, they had all heard it plainly-a bell ringing repeatedly. Michel had run post-haste to answer it.
So you see, Monsieur, I am not guilty, cried Michel anxiously.
And this button from a Wagon Lit tunic, how do you explain it?
I cannot, Monsieur. It is a mystery to me. All my buttons are intact.
Both of the other conductors also declared that they had not lost a button; also that they had not been inside Mrs. Hubbards compartment at any time.
Calm yourself, Michel, said M. Bouc, and cast your mind back to the moment when you ran to answer Mrs. Hubbards bell. Did you meet anyone at all in the corridor?
No, Monsieur.
Did you see anyone going away from you down the corridor in the other direction?
Again, no, Monsieur. Odd, said M. Bouc.
Not so very, said Poirot. It is a question of time. Mrs. Hubbard wakes to find someone in her compartment. For a minute or two she lies paralysed, her eyes shut. Probably it was then that the man slipped out into the corridor. Then she starts ringing the bell. But the conductor does not come at once. It is only the third or fourth peal that he hears. I should say myself that there was ample time-
For what? For what, mon cher! Remember, there are thick drifts of snow all round the train.
There are two courses open to our mysterious assassin, said Poirot slowly. He could retreat into either of the toilets or-he could disappear into one of the compartments.
