asked me to assist them, I should have refused. But this affair, the good God thrust it upon me."
"You were on the spot," said Van Aldin thoughtfully. "You examined the compartment, did you not?"
Poirot nodded.
"Doubtless you found things that were, shall we say, suggestive to you?"
"Perhaps," said Poirot.
"I hope you see what I am leading up to?" said Van Aldin. "It seems to me that the case against this Comte de la Roche is perfectly clear, but I am not a fool. I have been watching you for this last hour or so, and I realize that for some reason of your own you don’t agree with that theory?"
Poirot shrugged his shoulders.
"I may be wrong."
"So we come to the favour I want to ask you. Will you act in this matter for me?"
"For you personally?"
"That was my meaning."
Poirot was silent for a moment or two. Then he said:
"You realize what you are asking?"
"I guess so, said Van Aldin.
"Very well," said Poirot. "I accept. But in that case, I must have frank answers to my questions."
"Why, certainly. That is understood."
Poirot's manner changed. He became suddenly brusque and business-like.
"This question of a divorce," he said. "It was you who advised your daughter to bring the suit?"
"Yes."
"When?"
