The Fourth Deathly Hallow (слэш)

From the private journal of John. H. Watson MD; not intended for publication. Being an account of the strange case of the Fourth Deathly Hallow; in which Dr John H. Watson and Mr Sherlock Holmes save a life, discover the true secret of Professor Moriarty, unravel a time loop or two, encounter a femme fatale, imbibe potions, break into and out of a wizarding mansion, hide in a male brothel, go shopping, track down a magical artefact, almost attend a ritual sacrifice, fail to be Obliviated and totally ignore the International Statute of Wizarding Secrecy of 1692, all in the company of a lank-haired, irascible but secretly besotted schoolmaster, a bemused aristocrat and an increasingly perceptive and enamoured young hero.