I ran to the corner of the street. I could just see Moriarty, walking straight on. Then, to my great surprise, Holmes turned left, and disappeared into a house, while Moriarty reached the end of the street and turned the corner. I could not understand what was happening, or what I should do next. What if Holmes, realizing that someone was following him, thought I was one of Moriarty's men? Some minutes later, I was still wondering what to do when I heard a door close. A man came out into the street. It was Holmes. He was now richly dressed, in a hat and a long, dark coat. He had changed his appearance in several small and clever ways, but I knew him.