Conan Doyle’s ‘The Adventures of Sherlock Holmes’ contains 12 short stories, all originally published in the Strand magazine between June 1891 and July 1892. Some are better known than others, but all follow a fairly rigid format – a curious case is brought to Holmes’s attention by a flustered individual, often incognito, Watson’s support is engaged, and the case is then swiftly resolved. Disguises are often deployed, trusty service revolvers are pocketed, and Lestrade is ritually humiliated. In every story Holmes performs the deductions which are his hallmark, usually at the opening of the story, although rarely if ever are these deductions anything to do with the case in point.

A Scandal in Bohemia is the story in which Irene Adler, ‘the woman’, makes her one and only appearance in Conan Doyle’s stories. It is a simple case of blackmail which is resolved without Holmes’s assistance, because Irene marries and decides not to pursue her victim. Holmes counts it as one of his very few failures, which suggests his definition of success is somewhat flexible, but there is no suggestion of any attraction between the two, more a mutual respect.

The Red-Headed League is one of Holmes’s more ridiculous cases. A pawn broker is duped into leaving his store all day for several weeks to allow a tunnel to be dug from the premises to a nearby bank. The bank robbers could surely have found easier ways to do this than the invention of the League, which would have drawn a lot of attention to themselves, left clues all over the place, cost a lot of time and effort to establish, and could have fallen apart at any time.

A Case of Identity is one in which someone assumes a flimsy disguise, which Holmes sees through but fails to tell his client he has resolved the case. See ‘The Man with the Twisted Lip’

The Boscombe Valley Mystery. In this story Holmes bizarrely allows a murderer to go free, and a guilty man to spend months in prison, simply because the murderer is dying.

The Five Orange Pips sees Holmes allow his client to be brutally murdered and the murderers to escape the country, if not justice. Another great success!

The Man with the Twisted Lip. Someone assumes a flimsy disguise which Holmes sees through, again.

The Adventure of the Blue Carbuncle. In this story Holmes starts with the missing gem falling into his lap, and then working back to find out who stole it – an easier approach than the other way round I would have thought.

The Adventure of the Speckled Band. Conan Doyle thought this his finest Holmes story, but it is riddled with preposterous plot points.

The Adventure of the Engineer’s Thumb. A good headline, but a story in which Holmes detects absolutely nothing. Perhaps explains why this has not been an adaptor’s favourite.

The Adventure of the Noble Bachelor. A missing person story depending for its resolution of a previous relationship in America – the States is the setting for several of Holmes’s client’s backstories.

The Adventure of the Beryl Coronet. I think the real mystery – why a member of the royal family comes to pawn an incredibly valuable coronet for a fraction of its value – is ignored, instead focusing on whodunit in which footprints in the snow provide all the answers.

The Adventure of the Copper Beeches. A governess is recruited at highly inflated wages to impersonate a kidnapped heiress. Another case where the villains employ ridiculously complex means to pursue their villainy, when many other simpler options are available.

To Victorians, Holmes’s deductions and flashes of brilliance must have been dazzling, and to this day there are readers who hold Holmes in the highest possible regard. He is not the character most often portrayed on film for nothing. In recent years ‘Elementary’ and ‘Sherlock’ have given new life and new depths to the character. For me Holmes probably works best in this short story format where the weaknesses in his deductive method and approach aren’t too visible.