The first ever mention of Sherlock Holmes came in A Study in Scarlet, published in Beeton’s Christmas Annual of 1887. Dr Watson is looking for lodgings, and meets an old acquaintance who knows of someone he could share with, but does not recommend.

It’s more than a century since the world’s most famous literary detective made his appearance, but our appetite for his startling deductions is undiminished. Adam Frost and Jim Kynvin go back to the stories in search of data to explain his enduring appeal.

Mr. Holmes is in UK Cinemas June 19. The man beyond the myth.