J. K. Rowling has long praised Dodie Smith’s 1948 novel I Capture the Castle, declaring as an endorsement on recent editions that its seventeen-year-old narrator, Cassandra Mortmain, “one of the most charismatic narrators I’ve ever met.” Rowling’s deep affection is for a story that blends whimsy, eccentricity, and poignant coming-of-age realism. I Capture the Castle predates the Harry Potter series by fifty years and lacks overt magic, but there are intriguing resonances: a crumbling castle as home (Hogwarts), an eccentric family navigating poverty (Weasleys) and isolation (Lovegoods), vivid sensory descriptions (especially of food), and a young protagonist honing her voice through writing—much like Rowling’s own notebook-scribbled origins for Hogwarts, and the awkward transition into adulthood. The three parts of the book are separated into: The Sixpenny Book, The Shilling Book (a coin worth twelve pennies), and The Two-Guinea Book (a guinea being a coin worth two hundred and fifty two pennies).
The novel, told through Cassandra’s journals, chronicles six months in the 1930s life of the Mortmain family, who inhabit a dilapidated Suffolk castle leased on a forty-year term. Cassandra’s father, James Mortmain, once dazzled the literary world with his experimental masterpiece Jacob Wrestling but has since descended into creative paralysis, locking himself away with detective novels. The family—completed by beautiful, frustrated older sister Rose; bohemian stepmother Topaz; younger brother Thomas; and devoted orphan Stephen—scrapes by in genteel poverty, selling furniture to survive. Cassandra’s journals begin as an exercise in “capturing” sensations and people, evolving into a record of upheaval when American brothers Simon and Neil Cotton inherit the neighbouring estate and the castle itself. The motif of siblings living with a ‘bad’ dad in poverty, with their closest neighbours living in a grand house, will be familiar to readers of Rowling’s work.
The Charismatic Voice
Rowling’s admiration stems from Cassandra’s voice: witty, observant, and unflinchingly honest, yet laced with youthful idealism. Cassandra’s opening line—”I write this sitting in the kitchen sink”—sets a tone of quirky intimacy that Rowling echoes in her own vivid yet playful narration. Like Harry Potter’s wide-eyed discovery of a hidden world, Cassandra awakens to romance, class tensions, and self-awareness amid her isolated “ordinary” life. The castle, with its mismatched architecture spanning centuries, no electricity, and overgrown ruins, feels enchantingly alive, much as Hogwarts brims with personality through moving staircases and talking portraits. Much like Rowling’s own protagonists, Cassandra possesses a wry detachment from her own misery—noting, for instance, that while she wants to fling herself into the mud in despair, she has enough sense to know how bad she would look afterwards. This blend of sharp humour and deep vulnerability is a hallmark of Rowling’s character work, particularly in the later, more introspective Harry Potter volumes.
Eccentricity and Class
Parallels abound for Potter fans. The Mortmain’s eccentric household mirrors the Weasleys’ chaotic warmth: loved despite quirks, from Topaz’s nude communing with nature (evoking a less veiled Fleur Delacour) to Mortmain’s intellectual withdrawal. Food descriptions—meagre yet tantalising—prefigure Hogwarts feasts, turning humble meals into sensory delights. Inanimate objects gain voice: the family dress-frame “Miss Blossom” offers advice, akin to the chatty mirrors or portraits in Rowling’s world. Even names resonate—Rose Mortmain perhaps inspiring Ron and Hermione’s daughter—and train journeys punctuate the plot.
The Blocked Writer: James Mortmain, a father who spent his fame early and now reads detective novels in an irritable stupor, mirrors the “faded glory” or “lost genius” archetypes seen in Rowling’s secondary characters, such as Xenophilius Lovegood and Jasper Chiswell.
The Bohemian Stepmother: Topaz, who strides through the countryside in only wellington boots, shares the whimsical, slightly unhinged energy of a character like Luna Lovegood or Fleur Delacour.
Material Yearning: The desperate desire of Cassandra’s sister, Rose, to marry into wealth reflects the very real, non-magical pressures of class and poverty that Rowling weaves into Harry Potter, Casual Vacancy, Strike and The Ickabog.
Leda Strike parallels: Leda Fox-Cotton the bohemian London photographer, adopts Stephen, the working-class orphan, and saves him from both unrequited love and the responsibility that comes with the Mortmain family.
Capturing the Castle
I Capture the Castle shares with the Harry Potter adventures a seamless weaving of the sometimes funny, sometimes devastating. The capture in the title refers not to a siege, but to the act of observation. Cassandra’s final entry ends on a note of satisfaction for her family’s improved fortune despite her own heartbreak.
I Capture the Castle is not just as a 1930s period piece, but as a direct ancestor to the modern British fantasy tradition of finding magic in the mundane and resilience in the face of adversity.
Kinship to Harry Potter and Later
Yet the true kinship lies in themes of authorship and growth. Cassandra writes to practice writing, capturing her world as Rowling captures ideas in notebooks. James Mortmain’s block is the torment of stalled creativity, a shadow of Rowling’s own pre-Potter struggles. The novel’s romance—Rose’s pragmatic pursuit of wealth, and Cassandra’s tangled heart, blends with themes of growth, sacrifice, and maturity. Cassandra’s realisation that loving may matter more than being loved echoes Rowling’s moral core: choices define us, not fate alone.
According to a comment in Elisabeth Baird Hardy’s I Capture the Castle article at Hogwarts Professor, Rowling encountered the book in 1999, post-Prisoner of Azkaban, when a fan gifted it during a U.S. tour. By then, Hogwarts was established, so direct influence on the series is limited. Still, its spirit—romantic English countryside nostalgia, written in American exile—infuses Rowling’s work. I Capture the Castle evokes a mundane magic: dream-like midsummer rites, moonlight swims, bonfires that feel enchanted without spells. But, when you click on the book on Rowling’s current website, you get the message: “When I was a child, I read absolutely anything. These books are the ones I particularly loved then and read time and time again.” My feeling is that Rowling read, and loved this book as a child.
In a J. K. Rowling reading, Cassandra captures her castle not through conquest but observation and heart—a lesson Rowling amplified into a global phenomenon. For those who adore Hogwarts’ halls, this earlier castle offers quiet enchantment, proving charisma in narration needs no wand.
What a great catch of Leda as an adopter of orphans! Shanker/Stephen - maybe that will be his real name! And that link works if she only read it at the later date. I'm with you, though, in assuming the earlier - it would be an unusual bookish romantic girl of JKR's generation who didn't read this as a teenager (it went through my school like wildfire!). Have you checked about what the evidence is re - reading/rereading, as a gift that she read on the Azkaban tour isn't evidence that it wasn't a book she'd enjoyed some decades before?
Nick, is Alcott’s Little Woman commonly read by young girls in Britain? Or I should say, was it 50 years ago?