Helen Walker was originally announced for the role of Polly Walker. Photos of Walker in costume for the film have turned up in recent years.
Mrs Carstairs, the Lieutenant here is a great admirer of your books.
Dinah Carstairs: Oh really, which one did you like best Lieutenant?
Lt. Bill Smith: Er...... ..latest one, Mrs Carstairs. I thought it was excellent.
Dinah Carstairs: Oh, so you liked the Maltese Falcon?
Lt. Bill Smith: Yes, yes, that's the one.
Dinah Carstairs: ...
Lt. Bill Smith: ...