Father and daughter looked at each other.

"I saw him yesterday at the tennis," said M. Papopolous. "Zia, I hardly like this."

"He was very useful to you once," his daughter reminded him.

"That is true," acknowledged M. Papopolous; "also he has retired from active work, so I hear."

These interchanges between father and daughter had passed in their own language. Now M. Papopolous turned to the chasseur and said in French:

"Faites monter ce monsieur."

A few minutes later Hercule Poirot, exquisitely attired, and swinging a cane with a jaunty air, entered the room.

"My dear M. Papopolous."

"My dear M. Poirot."

"And Mademoiselle Zia." Poirot swept her a low bow.