When Sherlock Holmes needed to think, he liked to walk, and this morning he decided to walk all the way from Baker Street to London Bridge. His long legs moved quickly as he crossed the city. A lot of people stopped to look at the tall detective as he made his way to the station, but Holmes didn't see them. He was thinking about John McFarlane and Jonas Oldacre, and asking himself if McFarlane was a murderer. He really didn't think so, but he knew that it would be difficult to convince Inspector Lestrade of Scotland Yard. To Lestrade, McFarlane was the murderer of Jonas Oldacre. He had a good motive and he spent the evening at the builder's house.
Holmes arrived at London Bridge Station and found that he had to wait twenty minutes for the next train to Blackheath. He bought the late morning newspaper and read: Norwood Murder. Man Arrested. Holmes didn't read the story, but looked at the end: Says Inspector Lestrade, 'I think we have our man.' Holmes bought a ticket and travelling south to Blackheath.
It was a little before eleven thirty when he knocked on the door of the McFarlanes' house. It was a large house with a long, green garden at the front, and Holmes was a little bit surprised when Mrs McFarlane herself answered the door.
'Mrs McFarlane? Good morning. My name is Sherlock Holmes and I am trying to help your son in his time of trouble.'
'Oh, Mr Holmes, please come in,' the woman replied.