Hogwarts is the most heavily haunted dwelling place in Britain (and this is against stiff competition, as there are more reported ghost sightings/sensings on these damp islands than anywhere else in the world). The castle is a congenial place for ghosts, because the living inhabitants treat their dead friends with tolerance and even affection, no matter how many times they have heard the same old reminiscences.

Each of the four Hogwarts houses has its own ghost. Slytherin boasts the Bloody Baron, who is covered in silver bloodstains. The least talkative of the house ghosts is the Grey Lady, who is long-haired and beautiful.

Hufflepuff house is haunted by the Fat Friar, who was executed because senior churchmen grew suspicious of his ability to cure the pox merely by poking peasants with a stick, and his ill-advised habit of pulling rabbits out of the communion cup. Though a genial character in general, the Fat Friar still resents the fact that he was never made a cardinal.

JKR Nearly Headless Nick illustration

Gryffindor house is home to Nearly Headless Nick, who in life was Sir Nicholas de Mimsy-Porpington. Something of a snob, and a less accomplished wizard than he believed, Sir Nicholas lounged around the court of Henry VII in life, until his foolish attempt to beautify a lady-in-waiting by magic caused the unfortunate woman to sprout tusks. Sir Nicholas was stripped of his wand and inexpertly executed, leaving his head hanging off by a single flap of skin and sinew. He retains a feeling of inadequacy with regard to truly headless ghosts.

Another notable Hogwarts ghost is Moaning Myrtle, who haunts an unpopular girls’ toilet. Myrtle was a student at Hogwarts when she died, and she chose to return to school in perpetuity, with the short-term aim of haunting her arch-rival and bully, Olive Hornby. As the decades have rolled by, Myrtle has made a name for herself as the most miserable ghost in school, usually to be found lurking inside one of the toilets and filling the tiled space with her moans and howls.

Author’s note

The inspiration for Moaning Myrtle was the frequent presence of a crying girl in communal bathrooms, especially at the parties and discos of my youth. This does not seem to happen in male bathrooms, so I enjoyed placing Harry and Ron in such uncomfortable and unfamiliar territory in Harry Potter and the Chamber of Secrets and Harry Potter and the Half-Blood Prince.

The most productive ghost at Hogwarts is, of course, Professor Binns, the old History of Magic teacher who fell asleep in front of the staffroom fire one day and simply got up to give his next class, leaving his body behind. There is some debate as to whether or not Professor Binns realises he is dead. While his entrance to lessons through the blackboard is vaguely amusing the first-time students see it, he is not the most stimulating teacher.

The inspiration for Professor Binns was an old professor at my university, who gave every lecture with his eyes closed, rocking backwards and forwards slightly on his toes. While he was a brilliant man, who disgorged an immense amount of valuable information at every lecture, his disconnect with his students was total. Professor Binns is only dimly aware of his living students, and is astonished when they begin asking him questions.

In the very earliest list of ghosts I ever wrote for Hogwarts, I included Myrtle (initially named ‘Wailing Wanda’), Professor Binns, the Grey Lady (then called ‘the Whispering Lady’) and the Bloody Baron. There was also a Black Knight, The Toad (which left ectoplasm all over its classroom), and a ghost I rather regret not using: his name was Edmund Grubb, and the notes beside his name say: ‘Expired in the doorway of the Dining Hall. Sometimes stops people getting in, out of spite. Fat Victorian ghost. (Ate poisonous berries).’

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Original Writing