That was two years ago, Helen Stoner said. I have been very lonely without my sister, but a month ago a dear friend asked me to marry him. My stepfather has agreed, and so we're going to marry soon. But two days ago I had to move to my sister's old bedroom, because some men are mending my bedroom wall, and last night I heard that whistle again! I ran out of the house immediately and came to London to ask for your help. Please help me, Mr Holmes! I don't want to die like Julia!