“I should have gone to the City that day, but I was too disturbed in my mind to be able to pay attention to business matters. My wife seemed to be as upset as myself, and I could see from the little questioning glances which she kept shooting at me that she understood that I disbelieved her statement, and that she was at her wits’ end what to do. We hardly exchanged a word during breakfast, and immediately afterwards I went out for a walk, that I might think the matter out in the fresh morning air.

“I went as far as the Crystal Palace, spent an hour in the grounds, and was back in Norbury by one o’clock. It happened that my way took me past the cottage, and I stopped for an instant to look at the windows, and to see if I could catch a glimpse of the strange face which had looked out at me on the day before. As I stood there, imagine my surprise, Mr. Holmes, when the door suddenly opened and my wife walked out.