Grand Central Murder is a comedy/mystery film released in 1942. It was based on Sue MacVeigh's 1939 novel of the same name, and stars Van Heflin as a private investigator who is one of the suspects in a murder on a private train car in Grand Central Terminal. The film was directed by S. Sylvan Simon. Wikipedia
Mida King, Stage Name of Beulah Toohey: Where were you raised? Didn't anyone ever tell you its bad luck to whistle in a dressing room?
Whistling Messenger: I'm sorry miss, I... I was raised in a cattle boat, where folks whistle when they feel like it, including the cows!