M is for May and for Mycroft, so we have "The Adventure of the Greek Interpreter," which was published in The Strand in September 1893 and introduced the world to Holmes the elder and the Diogenes club.
Also I would like to reiterate that when ACD turned a phrase he turned it. One of my favorite lines in all of canon.
Art in the blood is liable to take the strangest forms.
Here Mycroft is judging you but is also too lazy to do anything about it.

Scholars think it may be Horace Vernet who Holmes refers to as uncle. He was a French military painter.
Italian Brigands Surprised by Papal Troops

I am just going to copy two items from The Annotated Sherlock Holmes that caught my attention (for different reasons).
The sexuality of Sherlock Holmes is oft debated by scholars, whose views range from traditional (Holmes loved Irene Adler) to outlandish (Holmes was a woman). The voyeur-reader is referred to Larry Townsend's The Sexual Adventures of Sherlock Holmes for a novel-length treatment of the possibiliy of Sherlock's (and Mycroft's and Watson's!) sexual preference for other men.
[so Holmes being a woman is outlandish but recommending a hardcore leather BSDM tome is not, hmm, and the ! after Watson's is so precious.]
And referring to ineffective charcoal fumes at the rescue at the end.
D. Martin Dakin marvels: "It is an odd thing how many of the scoundrels with whom Holmes had to deal seemed unable to resist the temptation to dispose of their victims by some complicated and lingering process which left them a chance of escape."
Here is the summary of the story:
Mr. Melas, a Greek interpreter, was summoned by Harold Latimer to translate on a mysterious business matter in Kensington. On the way in a coach with papered windows, Melas was threatened with a bludgeon. Eventually arriving at a large dark house, Melas met a captive man named Kratides, who revealed that Latimer and a woman were trying to coerce him into signing over property. Paul and the woman, Sophy, recognized each other unexpectedly. Melas is taken on a long coach ride and left far from home. He seeks help from Mycroft at the Diogenes Club, leading Sherlock Holmes to investigate. Mr. Davenport provides a lead to a house in Beckenham, where Melas and Kratides are found in danger. They are saved, but Kratides dies. It is revealed that Sophy sought revenge on Latimer and Kemp for mistreating them.
Also I would like to reiterate that when ACD turned a phrase he turned it. One of my favorite lines in all of canon.
Art in the blood is liable to take the strangest forms.
Here Mycroft is judging you but is also too lazy to do anything about it.

Scholars think it may be Horace Vernet who Holmes refers to as uncle. He was a French military painter.
Italian Brigands Surprised by Papal Troops

I am just going to copy two items from The Annotated Sherlock Holmes that caught my attention (for different reasons).
The sexuality of Sherlock Holmes is oft debated by scholars, whose views range from traditional (Holmes loved Irene Adler) to outlandish (Holmes was a woman). The voyeur-reader is referred to Larry Townsend's The Sexual Adventures of Sherlock Holmes for a novel-length treatment of the possibiliy of Sherlock's (and Mycroft's and Watson's!) sexual preference for other men.
[so Holmes being a woman is outlandish but recommending a hardcore leather BSDM tome is not, hmm, and the ! after Watson's is so precious.]
And referring to ineffective charcoal fumes at the rescue at the end.
D. Martin Dakin marvels: "It is an odd thing how many of the scoundrels with whom Holmes had to deal seemed unable to resist the temptation to dispose of their victims by some complicated and lingering process which left them a chance of escape."
Here is the summary of the story:
Mr. Melas, a Greek interpreter, was summoned by Harold Latimer to translate on a mysterious business matter in Kensington. On the way in a coach with papered windows, Melas was threatened with a bludgeon. Eventually arriving at a large dark house, Melas met a captive man named Kratides, who revealed that Latimer and a woman were trying to coerce him into signing over property. Paul and the woman, Sophy, recognized each other unexpectedly. Melas is taken on a long coach ride and left far from home. He seeks help from Mycroft at the Diogenes Club, leading Sherlock Holmes to investigate. Mr. Davenport provides a lead to a house in Beckenham, where Melas and Kratides are found in danger. They are saved, but Kratides dies. It is revealed that Sophy sought revenge on Latimer and Kemp for mistreating them.