Again a slight pause, then Van Aldin said:

“No.”

Poirot stopped dead, took off his hat, and held out his hand.

“I must wish you good day, Monsieur. I can do nothing for you.”

“What are you getting at?” demanded Van Aldin angrily.

“If you do not tell me the truth, I can do nothing.”

“I don’t know what you mean.”

“I think you do. You may rest assured, M. Van Aldin, that I know how to be discreet.”

“Very well, then,” said the millionaire. “I’ll admit that I was not speaking the truth just now. I did have further communication with my son-in-law.”