How we cite our quotes: All quotations are from Rear Window.
Quote #4
LISA: You can't ignore the wife disappearing, and the trunk, and the jewelry.
DOYLE: I checked the railroad station. Yesterday at 6:20 a.m., he bought a ticket. Ten minutes later, he put his wife on a train. Destination: Meritsville.
Doyle responds to Jeff's deductions with thorough fact-finding. Does this mean he's not as smart as they are? Doyle knows that murdering a wife is a pretty rare event, so he's probably working from a different set of assumptions. Plus, he hasn't been staring out the window for three days.
Quote #5
STELLA: Now, just where do you suppose he cut her up? Oh, of course! In the bathtub. That's the only place he could wash away the blood.
There are a fair number of lines like this in the film, as Jeff and his friends speculate on how Thorwald did the deed. They're weirdly admiring him in a way, commenting on Thorwald's cleverness at solving some fairly inconvenient issues (like how to get rid of a body). It makes the mystery even more irresistible to them since they're dealing with a criminal who's really thought things through.
Quote #6
LISA: It's just a picture of the backyard, that's all.
JEFF: I know. But there's one important change. The flowers in Thorwald's pet flower bed.
STELLA: You mean the one the dog was sniffing around?
Jeff uses his powers of observation here to note a small discrepancy in the layout of the flower bed: he's picking up on the tiniest of clues thanks to his obsessive looking and his visual skills honed as a photographer. Jeff is used to looking at photos and picking up on little details that no one else would.