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J.K. Rowling reveals new information on Sir Cadogan, Knight Bus, Aunt Marge, Boggart, and Professor Kettleburn in Pottermore

by Keith Hawk · December 20, 2012

Earlier today, Pottermore released the first installment from Harry Potter and the Prisoner of Azkaban. As you explore these first chapters, you will find lots of new information from author J.K. Rowling.

We are providing you with only a small sample of what Jo has to say regarding five significant backstories including: Boggarts, Knight Bus, Aunt Marge, Professor Ketttleburn, and Sir Cadogan.

Here is only a tidbit of the information released:

    • Boggarts: Like a poltergeist, a Boggart is not and never has been truly alive. It is one of the strange non-beings that populate the magical world, for which there is no equivalent in the Muggle realm. Boggarts can be made to disappear, but more Boggarts will inevitably arise to take their place. Like poltergeists and the more sinister Dementors, they seem to be generated and sustained by human emotions.
    • Knight Bus: The driver and conductor of the Knight Bus in Harry Potter and the Prisoner of Azkaban are named after my two grandfathers, Ernest and Stanley.
    • Aunt Marge: I regret making Aunt Marge a breeder of bulldogs, as I now know them to be a non-aggressive breed. My sister owns one and he’s the most loveable, affectionate dog you could hope to meet. On the other hand, they do look grumpy, and on appearance alone seemed to suit Aunt Marge.
    • Silvanus Kettleburn: Kettleburn was a loveable if eccentric man and his continuing employment at the school was evidence of the great affection in which staff and students held him. He finished his career with only one arm and half a leg. Albus Dumbledore presented him with a full set of enchanted wooden limbs on his retirement, a gift that had to be replaced regularly since, because Kettleburn’s habit of visiting dragon sanctuaries in his spare time meant that his prosthetics were frequently set on fire.
    • Sir Cadogan: Sir Cadogan’s portrait, which hangs on the seventh floor of Hogwarts Castle, shows him with the pony he rode forever more (which, understandably perhaps, never much liked him) and accurately depicts his hot temper, his love of a foolhardy challenge and his determination to beat the enemy, come what may.

To find out more on all of these new releases, be sure to head over to Pottermore right now, and begin exploring the interactive website.

Social:

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  • Previous story Pottermore releases the first installment of “Prisoner of Azkaban”

MuggleNet Archive

Important Dates

August 2025

Sun, Aug 31

Hermione and Ron become prefects
Recurs yearly

1995

Hermione purchases Crookshanks
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1993

September 2025

Mon, Sep 1

Harry and Ron travel to Hogwarts via Ford Anglia
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1992

Harry's first ride on the Hogwarts Express
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1991

Hermione receives Time-Turner
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1993

MuggleNet Live! 2017: Nineteen Years Later
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2017

Tue, Sep 2

Faux Moody transfigures Draco into a ferret
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1994

Gregorovitch is murdered by Lord Voldemort
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1997

Harry gets the Half-Blood Prince's Potions book
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1996

Trio breaks into the Ministry of Magic and acquires Slytherin's locket
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1997

Wed, Sep 3

Harry buries Alastor Moody's magical eye
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Harry's first detention with Professor Umbridge
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Lockhart lets Cornish pixies loose in class
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1992

Thu, Sep 4

Ellie Darcey-Alden's birthday
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Young Lily Evans

Hermione forms SPEW
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1994

Moody's first DADA lesson
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1994

Fri, Sep 5

Harry hears the Basilisk in the walls for the first time
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1992

Ron's wand backfires as he tries to curse Malfoy; Eat Slugs!
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1992

Sat, Sep 6

Harry's first potions class, where he loses 5 points for Gryffindor
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1991

Hogwarts: An Incomplete and Unreliable Guide, Heroism, Hardship and Dangerous Hobbies, & Power, Politics and Pesky Poltergeists (short stories; e-book) released - 2016
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2016

MuggleNet receives JKR Fansite Award
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2004

It’s high time I paid homage to the mighty MuggleNet. Where to start? I love the design, (I currently favour the ‘Dementor’ layout), the polls (I actually voted in the ‘Who’s the Half-Blood Prince?’ one), the pretty-much-exhaustive information on all books and films, the wonderful editorials (more insight there than in several companion volumes I shall not name), 101 Ways to Annoy Lord Voldemort (made me laugh aloud), the Wall of Shame (nearly as funny as some of the stuff I get)… pretty much everything. Webmaster Emerson, Eric, Jamie, Damon, Ben, Matthew, Rachel, Jaymz and Sharon, I salute you.

http://web.archive.org/web/20040907101729/http://www.jkrowling.com/textonly/fansite_view.cfm?id=15

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Did You Know

The first autographed copy of Harry Potter and the Half-Blood Prince was shipped across the Atlantic in a trunk and taken via armored truck to a secret location.

Potter History

September 10, 2007 – Harry Potter is named the highest-grossing motion picture franchise of all time, with $4.47 billion in ticket sales.

Potter Quote

“Only this morning, for instance, I took a wrong turning on the way to the bathroom and found myself in a beautifully proportioned room I have never seen before, containing a really rather magnificent collection of chamber pots. When I went back to investigate more closely, I discovered that the room had vanished.”

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