He who whispers

From In Search Of The Classic Mystery: "The war has ended and for the first time in years, The Murder Club reconvenes in London. Miles Hammond is invited along by none other than Dr Gideon Fell, but when he arrives, he finds that no-one from the Club has arrived. Only he and a mysterious woman, Barbara Morrell, are there to hear the tale of Professor Rigaud. He tells of the death of Howard Brookes, stabbed with his own sword-stick, while along on top of a tower. The only suspect is Fay Seton – but the only reason that she is a suspect is because of the stories about her. For only a vampire could float on air to the top of the tower…"