I left my friend's house shortly after seven. It was still too early for me to have my evening meal, so I walked along the seafront for about an hour until I began to feel hungry. By that time I was not far from a favourite restaurant of mine, where I often went to eat two or three times a week. I knew the owner well and frequently complimented him on his excellent cooking.
I went into the restaurant, which was already crowded, and ordered my meal. While I was waiting for the soup to arrive, I looked around to see if I knew anyone in the restaurant. It was then that I noticed that a man sitting at a corner table near the door kept glancing in my direction as if he knew me. I certainly did not know him, for I never forget a face' The man had a newspaper open in front of him, which he was pretending to read, though all the while I could see that he was keeping an eye on me. When the waiter brought my soup, the man was clearly puzzled by the familiar way in which the waiter and I addressed each other. He became even more puzzled as time went on and it grew more and more obvious that I was well known in the restaurant. Eventually he got up and went into the kitchen. After a few minutes he came out again, paid his bill and left without another glance in my direction.
When I had finished and was about to pay my bill, I called the owner of the restaurant over and asked him what the man had wanted. The owner was a little embarrassed by my question and at first he did not want to tell me. I insisted. «Well,» he said, «that man was a detective.» «Really?» I said, considerably surprised. «He was certainly very interested in me. But why?» «He followed you here because he thought you were a man he was looking for,» the owner of the restaurant said. «When he came into the kitchen, he showed me a photograph of the wanted man. He certainly looked like you! Of course, since we know you here, I was able to convince him that he had made a mistake.» «It's lucky I came to a restaurant where I am known,» I said, «otherwise I might have been arrested!»

1. Why did the narrator walk along the seafront for about an hour?
2. Why was the narrator sure that he had never met the man with a newspaper before?
3. What was the man with a newspaper puzzled by?
4. Why did the detective follow the narrator?