Sherlock Holmes is a fictional detective created by Scottish author
and physician Sir Arthur Conan Doyle. The fantastic London-based
"consulting detective", Holmes is famous for his astute
logical reasoning, his ability to adopt almost any disguise, and his
use of forensic science skills to solve difficult cases.
Holmes, who first appeared in publication in 1887, was featured in four novels and 56 short stories. The first novel, A Study in Scarlet, appeared in Beeton's Christmas Annual in 1887 and the second, The Sign of the Four, in Lippincott's Monthly Magazine in 1890. The character grew tremendously in popularity with the first series of short stories in Strand Magazine, beginning with A Scandal in Bohemia in 1891; further series of short stories and two novels published in serial form appeared between then and 1927. The stories cover a period from around 1880 up to 1914.
All but four stories are narrated by Holmes's friend and biographer, Dr. John H. Watson; two are narrated by Holmes himself ("The Blanched Soldier" and "The Lion's Mane") and two others are written in the third person ("The Mazarin Stone" and "His Last Bow"). In two stories ("The Musgrave Ritual" and "The Gloria Scott"), Holmes tells Watson the main story from his memories, while Watson becomes the narrator of the frame story.
This man's hat is not a "deer stalker" however, a deerstalker is a type of hat that is typically worn in rural areas, often for hunting, especially deer stalking. Because of the hat's popular association with Sherlock Holmes, it is also a stereotypical hat of a detective.
The most famous wearer of this kind of hat is the fictional character Sherlock Holmes, who is popularly depicted favouring this style of hat. Holmes is never actually described as wearing a deerstalker by name in Arthur Conan Doyle's stories, but in The Adventure Of Silver Blaze, the narrator, Doctor Watson, describes him as wearing "his ear-flapped travelling cap", and in The Boscombe Valley Mystery, as wearing a "close-fitting cloth cap". As the deerstalker is the only hat of the period matching both descriptions, it is not surprising that the original illustrations for the stories by Sidney Paget, Frederic Dorr Steele, and others depicted Holmes as a "deerstalker man", which then became the popular perception of him.