The Commissary shrugged his shoulders.
"It depends. We must get hold of the maid. It is possible that she has the red morocco case with her. If so, then the man of whom she spoke to Mademoiselle may be concerned in the case, and the affair is a crime of passion. I myself think the solution of a train robber is the more probable. These bandits have become very bold of late."
Poirot looked suddenly across to Katherine.
"And you, Mademoiselle," he said, "you heard and saw nothing during the night?"
"Nothing," said Katherine.
Poirot turned to the Commissary.
"We need detain Mademoiselle no longer, I think," he suggested.
The latter nodded.
"She will leave us her address?" he said.
Katherine gave him the name of Lady Tamplin's villa. Poirot made her a little bow.