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 of beginning—the gambit, do they not call it?”

Dr. Savaronoff smiled a little.

“Ah! I comprehend you now. Wilson opened Ruy Lopez—one of the soundest openings there is, and one frequently adopted in tournaments and matches.”

“And how long had you been playing when the tragedy happened?”

“It must have been about the third or fourth move when Wilson suddenly fell forward over the table, stone dead.”

Poirot rose to depart. He flung out his last question as though it was of absolutely no importance, but I knew better.

“Had he had anything to eat or drink?”

“A whisky and soda, I think.”

“Thank you, Dr. Savaronoff. I will disturb you no longer.”

Ivan was in the hall to show us out. Poirot lingered on the threshold.

“The flat below this, do you know who lives there?”

“Sir Charles Kingwell, a member of Parliament, sir. It has been let furnished lately, though.”

“Thank you.”

We went out into the bright winter sunlight.