October. "The Problem of Thor Bridge", a case which followed a month of trivialities and stagnation. This case refers to earlier cases which are undated but which probably happened during the 1890s and include "The Disappearance of the cutter Alicia", and the fate of "Isadora Persano" with its worm unknown to science [written up as "The Case of the Remarkable Worm" by June Thomson set some time after Watson's first marriage].
1902
Spring. "Sherlock Holmes and the Arabian Princess" by John North [Val Andrews].
May. "Shoscombe Old Place".
June. "The Three Garridebs". In this same month Holmes refused a knighthood "for services which may perhaps some day be described." After this case Watson moved out of Baker Street and set up practice again.
July. "The Revenge of the Hound" by Michael Hardwick.
September. "The Illustrious Client".
1903
January. "The Blanched Soldier". In this story told by Holmes himself, not Watson, Holmes refers to Watson having "deserted" him for a wife. Whilst Watson had indeed remarried, he had far from deserted Holmes and was involved in the case for the "Sultan of Turkey" presented here as "The Adventure of the Bulgarian Diplomat".
June. "The Mazarin Stone" and "The Three Gables". Sometime around now would also be the case of "The Phantom Organ" by John Taylor.
September. "The Creeping Man".
October. Holmes retires to a house on the Sussex Downs and spends his time beekeeping. In "Exit Sherlock Holmes", Robert Lee Hall suggests the retirement was prompted by the reappearance of Moriarty.
1906
April. "The Brighton Pavilion Mystery" by Val Andrews, which is entirely apocryphal. At this time Holmes was with Watson in America and resolving "The Enigma of the Warwickshire Vortex."
1907
July. "The Lion's Mane".
1909
March. "The Adventure of the Second Generation" by Ken Greenwald in which Holmes meets the daughter of Irene Adler.
1914
August. "His Last Bow", a case which began in 1912.
1918
November. "The Case of the Last Battle."
1920s
The passing of Holmes and Watson is not noted and some writers continue their adventures into the thirties and forties. These are all apocryphal. Watson was a year or two older than Holmes so both had entered their 70s by the mid-20s. Watson died soon after publication of The Case-Book of Sherlock Holmes in 1927. The final date of Holmes's death is not known. One touching story of these last years is "How a Hermit was Disturbed in His Retirement" [aka "The Adventure of Hillerman Hall"] by Julian Symon where Holmes is visited by a very young Miss Marple.
Appendix II: The Tales of Sherlock Holmes
Part 1: The Original Canon
The following lists all of Sir Arthur Conan Doyle's original stories in order of book publication, with original publication sources in both Britain and the United States.
A Study in Scarlet. Beeton's Christmas Annual, 1887; London, Ward Lock, 1887; Philadelphia, Lippincott, 1890.
The Sign of Four. Lippincott's Monthly Magazine, February 1890; London, Spencer Blacken, 1890; Philadelphia, Lippincott, 1893.
The Adventures of Sherlock Holmes. London, Newnes, 1892; New York, Harper, 1892. Contains:
"A Scandal in Bohemia", The Strand, July 1891.
"The Red-Headed League", The Strand, August 1891. "A Case of Identity", The Strand, September 1891.
"The Boscombe Valley Mystery", The Strand, October 1891. "The Five Orange Pips", The Strand, November 1891.
"The Man With the Twisted Lip", The Strand, December 1891.
"The Adventure of the Blue Carbuncle", The Strand, January 1892.
"The Adventure of the Speckled Band", The Strand, February 1892.
"The Adventure of the Engineer's Thumb", The Strand, March 1892.
"The Adventure of the Noble Bachelor", The Strand, April 1892.
"The Adventure of the Beryl Coronet", The Strand, May 1892.
"The Adventure of the Copper Beeches", The Strand, June 1892.
The Memoirs of Sherlock Holmes. London, Newnes, 1894; New York, Harper, 1894. Contains:
"Silver Blaze", The Strand, December 1892; Harper's Weekly, 25 February 1893.
"The Yellow Face", The Strand, February 1893; Harper's Weekly, 11 February 1893.
"The Stock-broker's Clerk", The Strand, March 1893; Harper's Weekly, 11 March 1893.
"The 'Gloria Scott', The Strand, April 1893; Harper's Weekly, 15 April 1893.
"The Musgrave Ritual", The Strand, May 1893; Harper's Weekly, 13 May 1893.
"The Reigate Squires", The Strand, June 1893; as "The Reigate Puzzle", Harper's Weekly, 17 June 1893.
"The Crooked Man", The Strand, July 1893; Harper'sWeekly, 8 July 1893.
"The Resident Patient", The Strand, August 1893; Harper's Weekly, 12 August 1893.
"The Greek Interpreter", The Strand, September 1893; Harper's Weekly, 16 September 1893.
"The Naval Treaty", The Strand, October 1893; Harper's Weekly, 14-21 October 1893.
"The Final Problem", The Strand, December 1893; McClure% December 1893.
The Hound of the Baskervilles. The Strand, August 1901-April 1902; London, Newnes, 1902; The Strand [New York], September 1901-May 1902; New York, McClure Phillips, 1902.
The Return of Sherlock Holmes. London, Newnes, 1905; New York, McClure, 1905. Contains:
"The Adventure of the Empty House", Collier's, 26 September 1903; The Strand, October 1903.
"The Adventure of the Norwood Builder", Collier's, 31 October 1903; The Strand, November 1903.
"The Adventure of the Dancing Men", The Strand, December 1903; Collier's, 5 December 1903.
"The Adventure of the Solitary Cyclist", Collier's, 26 December 1903; The Strand, January 1904.
"The Adventure of the Priory School", Collier's, 30 January 1904; The Strand, February 1904.
"The Adventure of Black Peter", Collier's, 20 February 1904; The Strand, March 1904.
"The Adventure of Charles Augustus Milverton", Collier's, 26 March 1904; The Strand, April 1904.
"The Adventure of the Six Napoleons", Collier's, 30 April 1904; The Strand, May 1904.
"The Adventure of the Three Students", The Strand, June 1904; Collier's, 24 September 1904.
"The Adventure of the Golden Pince-Nez", The Strand, July 1904; Collier's, 29 October 1904.
"The Adventure of the Missing Three-Quarter", The Strand, August 1904; Collier's, 26 November 1904.
"The Adventure of the Abbey Grange", The Strand, September 1904; Collier's, 31 December 1904.
"The Adventure of the Second Stain", The Strand, December 1904; Collier's, 28 January 1905.
The Valley of Fear. The Strand, September 1914-May 1915; London: Smith, Elder, 1915; The Philadelphia Press, 6 September-22 November 1914; New York, Doran, 1915.
His Last Bow. London, John Murray, 1917; New York, Doran, 1917. Contains: