Aylmer Vance and the Vampire

Alice and Claude Askew 

Aylmer Vance had rooms in Dover Street, Piccadilly, and now that I had decided to follow in his footsteps and to accept him as my instructor in matters psychic, I found it convenient to lodge in the same house. Aylmer and I quickly became close friends, and he showed me how to develop that faculty of clairvoyance which I had possessed without being aware of it. And I may say at once that this particular faculty of mine proved of service on several important occasions... 

Follow this link for the full text of the story.