“sherlock 1800s au”
There’s a fantastic fic writer who’s quite prolific in this area. Sixty stories already! I don’t know if they’re doing any more. Their username is ‘Arthur_Conan_Doyle’ but you have to google their stuff. They don’t put it on ff.net or AO3 or anything like that. Real awesome period piece type stuff too. They get all the little details right. It’s amazing.
I will still be laughing about this in my grave