Det. Insp. Atherly Jones: I want to know where the pearls are.
Dr. John H. Watson: Yes, where are they?
Mary Morstan: Small's taken them.
Dr. John H. Watson: Then they are at the bottom of the river where we can find them... so now you'll be so terribly rich, I can't even claim you as a friend, much less ask you...
Mary Morstan: What?
Sherlock Holmes: Sorry the jewels are so distasteful to you, Ms. Marston, but I have the pearls. I took them from Jonathan Small when we first came to grips. I didn't want them to get wet, so I'm afraid you'll have to have them back
Dr. John H. Watson: Amazing!
Sherlock Holmes: Elementary, my dear Watson, elementary.

Det. Insp. Atherly Jones: What I always says is, Mr. Holmes: an ounce of practice is worth a tonne of theory.
Sherlock Holmes: Yes, yes. I've heard you say it.

Sherlock Holmes: An amateur investigator like myself can't have too many facts of a case to work on.

Dr. John H. Watson: Well, now we know who did it. All we have to do is catch him.
Sherlock Holmes: Yes, that's all. Yes, well you go out and catch him, and I'll wait here 'til you come back
Dr. John H. Watson: Yes!
[Watson turns to leave, but suddenly comes to a stop]
Dr. John H. Watson: Er, but where'll I go?
Sherlock Holmes: Exactly. Let's leave jumping to conclusions to the professional detectives.

[last lines]
Mary Morstan: Please... ask me.
Dr. John H. Watson: Will you, um...
Mary Morstan: Yes!
[they embrace]
Sherlock Holmes: Amazing!
Dr. John H. Watson: Elementary, my dear Holmes, elementary.