When I was much younger than I am today.....I saw a British film about a blind woman who heard, what tuned out to be a murder, in the flat above her and the only clue to the identity of the murderer was that they had a wooden leg which she heard moving around in the room above. I recall it was a black and white film and that it was set imn the 1940s, or possibly the 1950s. Can anyone please help me with the title of the film?