from him which confirmed me in that belief. I mentioned the name of that surgeon in Knighton's hearing the day before yesterday. The natural thing would have been for Knighton to mention that he had been attended by him during the War, but he said nothing and that little point, if nothing else, gave me the last final assurance that my theory of the crime was correct. Miss Grey, too, provided me with a cutting, showing that there had been a robbery at Lady Tamplin's hospital during the time that Knighton had been there. She realized that I was on the same track as herself when I wrote to her from the Ritz in Paris.
"I had some trouble in my inquiries there, but I got what I wanted—evidence that Ada Mason arrived on the morning after the crime and not on the evening of the day before."
There was a long silence, then the millionaire stretched out a hand to Poirot across the table.
"I guess you know what this means to me, Monsieur Poirot," he said huskily. "I am sending you round a cheque in the morning, but no cheque in the world will express what I feel about what you have done for me. You are the goods, Monsieur Poirot. Every time, you are the goods."
Poirot rose to his feet; his chest swelled.
"I am only Hercule Poirot," he said modestly, "yet, as you say, in my own way I am a big man, even as you also are a big man. I am glad and happy to have been of service to you. Now I go to repair the damages caused by travel. Alas! my excellent Georges is not with me."
In the lounge of the hotel he encountered a friend—
