- Sherlock Holmes: This man pervades Europe like a plague, yet no one has heard of him. That's what puts him on the pinnacle in the records of crime.
- Dr. John H. Watson: What's he do?
- Sherlock Holmes: Everything and nothing. In his whole diabolical career, the police have never been able to pin anything on him. And yet, show me crime without motive, robbery without a clue, murder without a trace and I'll show you Giles Conover.
- Dr. John H. Watson: But that's amazing, Holmes.
- Sherlock Holmes: Two years ago, he disappeared from his usual haunts and I have every reason to believe that he... Oh, here it is... I've every reason to believe that he's back in England again. If I could free society of this sinister creature, I should feel that my own career had reached it's summit.
- Dr. John H. Watson: Well, how... how does the, uh, the thing work?
- Sherlock Holmes: Electricity. The high priest of false security.
- Dr. John H. Watson: Amazing. And the Borgia Pearl's inside that?
- Sherlock Holmes: If it isn't, I shall retire to Sussex and keep bees.
- Sherlock Holmes: My dear Watson, I really must caution you against hitting newspaper reporters in the teeth...
- Sherlock Holmes: Watson, look sharp, will you? Go to that door to the alley, and do exactly as I tell you.
- Dr. John H. Watson: Huh?
- Sherlock Holmes: No, not "huh". Just do it.
- [last lines]
- Sherlock Holmes: What's Conover? No more than a symbol of the greed and cruelty and lust for power that have set men at each other's throats down through the centuries... and the struggle will go on, Watson, for a pearl... kingdom... perhaps even world dominion... till the greed and cruelty have burned out of every last one of us... and when that time comes... perhaps even the pearl... will be washed clean again.
- Dr. John H. Watson: [viewing the Borgia Pearl] Huh, can't be real.
- Sherlock Holmes: Real as death, old fellow, with the blood of twenty men upon it down through the centuries.
- Sherlock Holmes: I don't like your work, Conover. I've seen quite a bit of it both here in London and and elsewhere on the continent. Don't like the smell of you either. That underground smell, the sick sweetness of decay. You haven't robbed and killed merely for gain like any ordinary halfway decent thug. No, you're in love with cruelty for it's own sake.
- Inspector Lestrade: When a lady gets hysterical...
- Sherlock Holmes: She may do many desperate things but, my dear Lestrade, she does not run around the walls like a mouse.
- Inspector Lestrade: Well, Mr. Holmes, if it's a psychology of knives and forks and milk jugs you're talking about...
- [CHUCKLES]
- Inspector Lestrade: I beg to be excused.
- Sherlock Holmes: I'm trying to account for this broken china, Lestrade. That outstanding feature of this case whether you know it of not. All these broken plates, plaster ornaments, bric-a-brac, why was all this china smashed and nothing disturbed? Why?
- Dr. John H. Watson: Yes, and how about his back being broken? A man can't just fall down and and break his back in that casual way you know.
- Sherlock Holmes: Right you are, Watson. External force is indicated. There's no doubt about it. Major Harker's back was broken deliberately
- Inspector Lestrade: I suppose you're going to tell us just who did it?
- Sherlock Holmes: Yes, I think I can. I've never known but one killer who used that technique.
- Inspector Lestrade: What? Oh, come on. He's dead and done for.
- Sherlock Holmes: You remember him?
- Inspector Lestrade: Am I likely to forget the Hoxton Creeper?
- Dr. John H. Watson: Hoxton Creeper?
- Inspector Lestrade: Hoxton Horror, I called him.
- Sherlock Holmes: A monster, Watson, with a chest of a buffalo and the arms of a gorilla. His particular method of murder is back breaking and it's always the same, the third lumbar vertebrae.
- Dr. John H. Watson: How horrible.
- Inspector Lestrade: Do mean to stand there and tell me you think he's still alive? Why they got him two years ago trying to escape from Devil's Island.
- Sherlock Holmes: Did they?
- Inspector Lestrade: Yeah.
- Sherlock Holmes: I wonder. I'll lay you odds he's in London at this very moment.
- Inspector Lestrade: Alright, Mr. Holmes you stick to your theories, I'll stick to my facts.
- [first lines]
- Courier: Who's there?
- First Ship's Steward: Steward, sir.
- Courier: I say, we're not at Dover yet, are we?
- First Ship's Steward: No sir, but there's a message for you, sir, in the wireless room.
- Courier: I'll be right there.