As it is in A Study in Scarlet that Mr Sherlock Holmes is first introduced to the public, and his methods of work described, it occurred to the publishers of the volume that a paper on "Sherlock Holmes", which Dr Doyle's old master, Dr Joseph Bell, the original of Sherlock Holmes, contributed recently to The Bookman, would greatly interest readers who did not see it when it appeared in that publication. Dr Bell's "intuitive powers" in dealing with his patients were, so his pupil, Dr Doyle, tells us in the pages of The Strand Magazine "simply marvellous". Case No. I would step up.