🌍 The Great Hiatus (1891–1894)
Three missing years: Tibet as the Norwegian explorer Sigerson, Persia, Mecca, Khartoum, and a laboratory in Montpellier — while London believed him dead and Colonel Moran kept watch. The most argued-over gap in any fictional biography.
Three years the world thought him dead
Holmes did not die at Reichenbach; he let the world believe it. Only Mycroft knew the truth. For three years — the period Sherlockians call the Great Hiatus — Holmes vanished into a second life: two years wandering Tibet as the Norwegian explorer Sigerson, a visit to the Khalifa at Khartoum, and months in a laboratory at Montpellier researching coal-tar derivatives.
Why he stayed dead
He remained officially dead because two of Moriarty's most dangerous men still lived and would kill him the moment he surfaced. The Hiatus is the most argued-over gap in any fictional biography — an open invitation that generations of writers have filled with their own adventures. Holmes ends it only when it is safe, and when London offers a case worth resurrection.