Plugging in all the available stated dates (where they’re not contradictory), my chronology is currently at something like this (question marks subject to change, etc.):
The ‘Gloria Scott’ - Summer 1875 [1] (Framing: Winter 1882-3?)
- The maths as stated don’t work, as 1855 + 30 = 1885, and these events can’t occur after A Study In Scarlet. 1875 would have to be Holmes’s second year of college.
The Musgrave Ritual - 1879 (Framing: Winter 1882-3?)
- It is stated to have been four years since Holmes last saw Musgrave. Holmes mentions telling Watson about the events of ‘Gloria Scott’. Watson must be living at 221b at the time, as his intro describes Holmes’s extremely messy habits in terms of lodging with him.
A Study In Scarlet - Jan-Mar 1881
- Watson states the date he discovered Holmes’s profession explicitly as the 4th of March, which was several weeks after they moved in together. I find it likely that it was at most mid-January when they met, and that Watson spent February observing Holmes’s habits and trying to figure him out.
The Resident Patient - Oct 1881
- Watson describes these events as being ‘towards the end of the first year during which Holmes and I shared chambers’, and then specifies that it was October.
The Valley Of Fear - Jan 1882 [2]
- It is stated to be ‘in the late eighties’, but Holmes appears to still be getting used to Watson’s sense of humour, which he claims is ‘developing’ pointing to it being earlier while Watson is still recovering from his illness. Any later and Holmes would already be very familiar with his closest companion’s personality.
The Speckled Band - Apr 1883
The Beryl Coronet - Feb 1884
The Copper Beeches - Early Spring 1884
The Yellow Face - 1883-5?
The Hound Of The Baskervilles - Oct 1885 [3]
- Mortimer’s stick is dated 1884 and Holmes notes this was 5 years ago (making it 1889), but Watson neither appears to be married nor in medical practice, and since this story is explicitly dated to before Holmes’s ‘death’, this precludes it being set after 1888.
The Greek Interpreter - 1884-6?
The Reigate Squires - Apr 1887
The Sign of Four - Jul 1887 [4]
- It is stated to be July (later mistakenly stated as September) 1888, but this contradicts both SCAN (March 1888) and FIVE (September 1887). There also seems to be a pearl missing as Mary describes their delivery.
The Cardboard Box - Aug 1887
- Holmes mentions both A Study In Scarlet and The Sign Of Four by name - which implies that Watson is a very speedy writer, since this would be only a few weeks later. However, this may be taken as self-promotion on Watson’s part.
The Noble Bachelor - Autumn 1887
- This story is dated to 1887 via Lord St Simon’s age, but Watson is soon to be married - which is not possible if he has not yet met his fiancée. Dating SIGN to July 1887 fixes this discrepancy.
A Scandal In Bohemia - Mar 1888
- Watson explicitly dates the start of this case to the 20th of March 1888, and states that he hasn’t seen Holmes for several months following his marriage (which would be in the late autumn to winter of 1887).
The Stockbroker’s Clerk - Jun 1888
- Watson states that he acquired his practice ‘shortly after’ his marriage, and that he was too busy to visit Holmes at Baker Street for three months. Counting most of March for the first month, that takes us to the June he states, which is the first time Holmes has visited Watson at his practice.
The Naval Treaty - Jul 1888
[The Second Stain - Jul 1888**]
- I take it that the story of this name is heavily if not entirely fictionalised. This is when the real events that inspired it occurred.
The Crooked Man - Summer 1888
The Five Orange Pips - Sep 1888 [5]
- It is stated to be September 1887, but even if SIGN occurred in July of that year, Watson and Mary have not married yet for him to be ‘staying at Baker Street’ while she is away visiting her (dead) mother.
The Boscombe Valley Mystery - Spring 1889?
The Man With The Twisted Lip - Jun 1889
- I place this after BOSC, as Holmes takes it as a given that Watson’s wife will not object to him sending a note and running off on a case in the middle of the night. (I suspect he’s wrong and will be due a bollocking after breakfast)
The Engineer’s Thumb - Summer 1889
The Dying Detective - Nov 1889
- Watson describes this as happening in his ‘second year of marriage’, which, 1888 being his first, works out to 1889.
A Case Of Identity - Sep 1890
The Red Headed League - Oct 1890
The Blue Carbuncle - Dec 1890
The Final Problem - Apr-May 1891
The Empty House - Mar 1894
The Norwood Builder - Summer 1894
- Stated to take place ‘several months’ after Holmes’s return. Watson has moved back to Baker Street and sold his practice.
The Golden Pince-Nez - Nov 1894
The Solitary Cyclist - Apr 1895
The Bruce-Partington Plans - Nov 1895
The Veiled Lodger - Early 1896
The Devil’s Foot - Mar 1897
The Abbey Grange - Winter 1897
Wisteria Lodge - Mar 1898-99? [6]
- It is stated to be March 1892, but this is impossible as Holmes is presumed dead at that time. It also can’t be March ‘91 as Holmes is too busy at that time, and referencing REDH eliminates March ‘90 or any year earlier. Further, Holmes complains of boredom due to a lack of cases, which eliminates 1894 due to a very high number of cases in that year (he also would only have been back about two weeks at that point). Holmes is also busy March ‘95, ‘96, and ‘97. It is not until at least 1898 that there may be time for him to be bored by March.
The Priory School - May 1901?
- Years listed with regard to Lord Holdernesse date the story post 1900 and wording makes it seem that that is not the present year. Due to a reference in BLAC, I briefly thought Watson was dating the case to 1895, but I’m fairly sure that’s just confusing wording.
The Three Garridebs - Jun 1902
The Illustrious Client - Sept 1902
The Creeping Man - Sept 1902
The Blanched Soldier - Jan 1903
The Lion’s Mane - Jul 1907
I still need to place the following stories, which don’t have dates attached to them:
Charles Augustus Milverton
The Three Students placed
The Missing Three-Quarter placed
The Disappearance of Lady Frances Carfax
The Problem of Thor Bridge