"Taxi"! I called. A taxi stopped near me and I asked, "Can you take me to the London Airport, please?" "Certainly, sir," said the driver. I got in and sat down. "Please hurry," I said, "I must catch a plane at 11:10." Then I saw a bag on the seat. "There is a bag on the seat. Is it yours?" I said. "A bag, sir?" the driver said, "No, it's not mine. May I have a look at it?" I gave the bag to the driver. "It's an old man's. He was my last passenger," the driver said. "I must take it to the police station." The taxi stopped at the airport and I got out. Suddenly another taxi stopped at the airport and an old man got out. He came to us quickly. "Where is my bag?" "Oh, it's you, sir," the driver said, "I have it here." "Thank you very much," the old man said. "I followed you all the way to the airport."