Trivia: Hitchcock had two cameo appearances in the movie Suspicion: the first takes place right after the opening scene where Johnnie and Lina meet on the train, when Johnnie and friends are gathered for a 'photo op' just prior to the start of the 'hunt'. You see Hitchcock shortly after that scene walking with a horse past the camera. He is to the left of the horse and is wearing a cap and light colored jacket. The second cameo shows Hitchcock, albeit from a distance and not easily identifiable and ever so briefly, posting a letter at a mailbox in town.
Lina McLaidlaw Aysgarth: When he enticed his victim across the footbridge, knowing that the bridge has been sawn through.
Isobel Sedbusk: He also knew that his victim couldn't swim. Don't forget that.
Lina McLaidlaw Aysgarth: Well, what I want to know is this. Would you call that an actual murder?
Isobel Sedbusk: Well, from a moral standpoint there's no question at all. It is murder.
Question: Was Lina supposed to open the necklace box when Johnnie gave it to her on the patio with the other gifts from the horse race? She tries a few times and can't.