The novel Twins to the Rescue by Australian author Noreen Cotter tells the story of twins named Gemma and Tim. They get bored during the summer holiday and wander off down the street to find some fun. In the following excerpt (选段), when they come across retired school teacher Mary Carpenter’s house, Tim sees a strange large hand tug down (下拉) the window shade (百叶窗). Who is there? Let’s find out.