- Sherlock Holmes: If the art of the detective began and ended in reasoning from an armchair, my brother would be the greatest criminal agent that ever lived.
- [last lines]
- Dr Watson: What'll become of her?
- Sherlock Holmes: After questioning, nothing. It's not a crime to have a cold heart and not a single shred of compassion.
- Dr Watson: I didn't know you had a brother.
- Sherlock Holmes: Oh yes. And I can assure you that he possesses a far greater faculty for observation and deduction than I do.
- Dr Watson: Holmes, I know that you are a modest man...
- [Holmes laughs]
- Mycroft Holmes: Come in, Sherlock! Come in, sir! You don't expect such energy from me, do you, Sherlock, hmm?
- Sherlock Holmes: How did you get here?
- Mycroft Holmes: I passed you while you were in the telegraph office.
- Sherlock Holmes: Can you not find a magistrate to sign this warrant for us?
- Inspector Gregson: At this hour?
- Sherlock Holmes: At this very minute. Or kidnapping could become murder!
- Inspector Gregson: I can but try.
- Sherlock Holmes: Please do.
- Mycroft Holmes: Look at those two men, Sherlock. What do you make of them?
- Sherlock Holmes: Of the billiard-marker and the other?
- Mycroft Holmes: Precisely.