- Sherlock Holmes: [Reading a letter] It's from my brother Mycroft. He writes like a drunken crab.
- [to Watson]
- Sherlock Holmes: You'd better read it. Doctors are more used to hieroglyphics than normal human beings.
- Sherlock Holmes: Mrs. Hudson, you know, you're hideously in the way!
- Mrs. Hudson: I'm sorry, sir, but I only have one pair of hands!
- Sherlock Holmes: Please, disappear.
- Sherlock Holmes: [Musing about the fog] The London criminal is certainly a *dull* fellow. The thief or the murderer could roam London on a day like this as the tiger does the jungle, unseen until he pounces, and then evident only to his victim.
- [last lines]
- Mycroft Holmes: [In a celebratory mood] There's an R in the month, and the Diogenes Club has the most excellent oysters. I should like both you gentlemen to be my guests. Come along, Sherlock.
- Mycroft Holmes: All my instincts are against this explanation, and yours too, I think. We are not brothers for nothing.
- [first lines]
- Clerk at Woolwich Station: Evening, Mr West.
- Cadogan West: Third class, London Bridge.
- Clerk at Woolwich Station: Single or return?
- Cadogan West: Oh,it doesn't matter. Single.
- [a whistle is heard]
- Cadogan West: Quickly. Quickly.