The Progress of Sherlock Holmes, by ivyblossom
Carte Blanche by ivyblossom
Just... just so well written, and beautifully tender, and meticulously plotted, and so goddamn spot on with the characterizations. She has this crystal-clear vision of the dynamic between John and Sherlock -- it's like the unified field theory of fanfic.
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The other reasons why may be considered TMI. )