Looking for a Long Holmes/Watson Fic

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Unlike many of the posts here, I am not looking for a specific fic. However, I could use a recommendation.

While usually I read pwp smut, I find myself wishing for something longer and more substantial. A piece where Holmes and Watson discover their feelings for each other rather slowly and carefully, and then continues on with the development of their romantic/sexual relationship. So, yes, some smut, but with actual background and reasoning building up to it. Any Victorian-verse is fine (though I'll be honest- I'll be imaging the '09 movieverse characters in my head). Ideally, it'd contain some angst and a relatively happy ending, but not entirely necessary. 

Thank you in advance!