The House of Fear (1945)
Sherlock Holmes: Murder is an insidious thing. Once a man has dipped his fingers in blood, sooner or later he'll feel the urge to kill again.
Sherlock Holmes: This is a most unique case. Instead of too few we have too many clues and too many suspects. The main pattern of the puzzle seems to be forming, but the pieces don't fit in.
Dr. John H. Watson: Muddy waters, eh, Holmes?
Sherlock Holmes: Too muddy. As if someone were constantly stirring them up.
Dr. John H. Watson: Why should they stir them up?
Sherlock Holmes: To confuse me. There's intelligence behind this business, Watson. Cold, calculating, ruthless intelligence.
Dr. John H. Watson: I'm sorry I'm late. I didn't sleep very well.
Sherlock Holmes: Didn't sleep very well? You snored like a pig!