The four of them arrived at the residence of Sean Anderson. Sean opened the door and welcomed them in and said, "Please come in, I think you have come here for asking me some money on loan. Alright but I must warn you I also take interest in return as well and…" "Uh, sir we didn't come here for asking loans...I'm Dr. Joe Rollins. I've come here to write a book about the behaviour of people of London so I'm visiting people." said Stephen. "Oh, let me prepare some drink for you and your friends," he said. Stephen judged Sean carefully. He had light orange hair. He was muscular and Stephen quickly made his decision that this is the killer of David Erasmus. When Sean returned from the kitchen Stephen asked what kind of job do you do Mr. Anderson?" "I'm an architect. I draw plans for buildings and other structures." "So that means you're left handed." said Stephen. "What? How do you know that?" "Simple. I saw you work in the kitchen and you mostly used your left hand but when I asked your profession and you told me that you're an architect, so I felt conformed." Stephen said. "But I don't get it. How is it related to my left handiness?" asked Sean. "The watch you're wearing on your right hand. You wear it on right wrist as it irritates you when you draw plans, if you wear it on your right hand." said Stephen. "Wow, you're some kind of a doctor!" said Sean. After a few hours of chatting on their topic, Stephen said, "We must now leave. It's already getting late." "Please come again soon," said Sean. "Oh we will..."smiled Stephen. Then the four of them drove to police station. There Stephen gave his conclusion, "gentlemen, the murderer has been found and he is Sean Anderson."