“She went away, and I went on with my book. There was a step on the stairs, and I looked up to see Mark coming down. He went into the office, and I went on with my book again. I went into the library for a moment, to refer to another book, and when I was in there I heard a shot. At least, it was a loud bang, I wasn’t sure if it was a shot. I stood and listened. Then I came slowly to the door and looked out. Then I went back again, hesitated a bit, you know, and finally decided to go across to the office, and make sure that it was all right. I turned the handle of the door and found it was locked. Then I got frightened, and I banged at the door, and shouted, and⁠—well, that was when Mr. Gillingham arrived.” He went on to explain how they had found the body.

The inspector looked at him with a smile.