Details of Sherlock Holmes's life in Conan Doyle's stories are scarce and often vague. Nevertheless, mentions of his early life and extended family paint a loose biographical picture of the detective.
A statement of Holmes's age in "His Last Bow" places his year of birth at 1854; the story, set in August 1914, describes him as sixty years of age.[21] His parents are not mentioned, although Holmes mentions that his "ancestors" were "country squires". In "The Adventure of the Greek Interpreter", he claims that his grandmother was sister to the French artist Vernet, without clarifying whether this was Claude Joseph, Carle, or Horace Vernet. Holmes's brother Mycroft, seven years his senior, is a government official. Mycroft has a unique civil service position as a kind of human database for all aspects of government policy. Sherlock describes his brother as the more intelligent of the two, but notes that Mycroft lacks any interest in physical investigation, preferring to spend his time at the Diogenes Club.[22][23]
Holmes says that he first developed his methods of deduction as an undergraduate; his earliest cases, which he pursued as an amateur, came from fellow university students.[24] A meeting with a classmate's father led him to adopt detection as a profession.[25]
Life with Watson
Holmes (right) and Watson in a Sidney Paget illustration for "The Adventure of Silver Blaze"
In the first Holmes tale, A Study in Scarlet, financial difficulties lead Holmes and Dr. Watson to share rooms together at 221B Baker Street, London.[26] Their residence is maintained by their landlady, Mrs. Hudson.[27] Holmes works as a detective for twenty-three years, with Watson assisting him for seventeen of those years.[28] Most of the stories are frame narratives written from Watson's point of view, as summaries of the detective's most interesting cases. Holmes frequently calls Watson's records of Holmes's cases sensational and populist, suggesting that they fail to accurately and objectively report the "science" of his craft:
Detection is, or ought to be, an exact science and should be treated in the same cold and unemotional manner. You have attempted to tinge it [A Study in Scarlet] with romanticism, which produces much the same effect as if you worked a love-story or an elopement into the fifth proposition of Euclid. ... Some facts should be suppressed, or, at least, a just sense of proportion should be observed in treating them. The only point in the case which deserved mention was the curious analytical reasoning from effects to causes, by which I succeeded in unravelling it.[29]