“I could not say, sir, I am sure,” said Mason at last. “It might be and again it might not. Seeing as how I only saw his back, it’s hard to say. I rather think it was the gentleman.”

“But you are not sure?”

“No‑o,” said Mason unwillingly; “n‑no, I am not sure.”

“You have seen this gentleman before in Curzon Street?”

Mason shook her head.

“I should not be likely to see any visitors that come to Curzon Street,” she explained, “unless they were staying in the house.”

“Very well, that will do,” said the Examining Magistrate sharply.

Evidently he was disappointed.