I remain mildly amused that I was not immediately tagged for this in the guessing interval (and wholly flattered that the wrong guesses were for some of Holmestice's most talented writers). Likewise, I am still boggling a little at the degree of enthusiasm expressed in the comments on this story over on AO3....
The Mice and the Mastermind
Fandom: Basil of Baker Street, Without A Clue
Rating: all ages
Category: gen
Warnings: none
Words: ~2200
Relationships: Sherlock Holmes & John Watson, Basil of Baker Street & Sherlock Holmes, Reginald "Sherlock Holmes" Kincaid & John Watson
Characters: Basil of Baker Street, David Q. Dawson, John Watson, Reginald "Sherlock Holmes" Kincaid
Additional Tags: crossover, AU-Canon Divergence
The Sherlock Holmes of the mouse world has learned all he knows of detection and investigation at the feet of the Master himself. And then one evening in Baker Street, he and Dr. Dawson discover that they may not know Sherlock Holmes quite so well as they think.