Tom Smith was a writer. He wrote detective stories for magazines. One evening he could not find an end for a story. He sat with his typewriter in front of him, but he had no ideas. So he decided to go to the cinema. When he came back, he found that he had had a visitor. Someone had broken into his flat. The man had had a drink, smoked several of Tom's cigarettes--and had read his story. The visitor left Tom a note. I have read your story and I don't think much of it. Please read my suggestions and then you can finish it. By the way, I am a burglar, I am not going to steal anything tonight. But if you become a successful writer, I will return! Tom read the burglar's suggestions. Then he sat down and wrote the rest of the story. He is still not a successful writer, and he is waiting for his burglar to return. Before he goes out in the evening, he always leaves a half-finished story near his typewriter. What did Tom Smith write about?