Our visitor told us some more of her story. "My sister died two years ago. Or two years I have been very lonely. But now an old friend says he is in love with me, and he wants to marry me. My stepfather does not mind, and we are going to be married in the spring. Two days ago, some builders repaired a part of the house. They broke the wall of my bedroom, so now I sleep in my sister’s room. The room where she died. I am in the same bed too.

Last night something terrible happened. I was in bed thinking about my sister’s death when I heard a whistle. It was the same whistle that my sister asked me about before she died. I was very frightened and got out of bed. I turned on the light, but there was nothing in the room. As soon as the morning came, I went to the train station, and came to ask you for help."

"You did the right thing" said Holmes. "But that is not all the story."