Miss Lenox Tamplin happened to mention one day that Knighton’s limp had been a surprise to the surgeon who had been in charge of the case in her mother’s hospital. That suggested camouflage. When I was in London I went to the surgeon in question, and I got several technical details 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 realised 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.”