Short story by 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.
At the same time I made myself useful to Vance in other ways, not the least of which was that of acting as recorder of his many strange adventures. For himself, he never cared much about publicity, and it was some time before I could persuade him, in the interests of science, to allow me to give any detailed account of his experiences to the world.