"Anything more, Watson?"
"Yes, one thing which struck me more than anything else. I had driven to the Blackheath Station and had caught my train there, when just as it was starting I saw a man dart into the carriage next to my own. You know that I have a quick eye for faces, Holmes. It was undoubtedly the tall, dark man whom I had addressed in the street. I saw him once more at London Bridge, and then I lost him in the crowd. But I am convinced that he was following me."
"No doubt! No doubt!" said Holmes. "A tall, dark, heavily-moustached man, you say, with grey-tinted sun-glasses?"
"Holmes, you are a wizard. I did not say so, but he had grey-tinted sun-glasses."
"And a Masonic tie-pin?"
"Holmes!"
"Quite simple, my dear Watson. But let us get down to what is practical. I must admit to you that the case, which seemed to me to be so absurdly simple as to be hardly worth my notice, is rapidly assuming a very different aspect. It is true that though in your mission you have missed everything of importance, yet even those things which have obtruded themselves upon your notice give rise to serious thought."
"What have I missed?"
"Don't be hurt, my dear fellow. You know that I am quite impersonal. No one else would have done better. Some possibly not so well. But clearly you have missed some vital points. What is the opinion of the neighbours about this man Amberley and his wife? That surely is of importance. What of Dr. Ernest? Was he the gay Lothario one would expect? With your natural advantages, Watson, every lady is your helper and accomplice. What about the girl at the post office, or the wife of the greengrocer? I can picture you whispering soft nothings with the young lady at the 'Blue Anchor,' and receiving hard somethings in exchange. All this you have left undone."
"It can still be done."