How Did Deborah Harkness Research Witches And Magic In Her Novels?

She took the slow, nerdy route and I love her for it — Harkness didn’t treat witches like a flashy prop. From everything I’ve read and loved in 'A Discovery of Witches', it’s clear she spent years reading both scholarly tomes and obscure manuscripts. She draws on early modern occultists, alchemists, and practical herbalists: think arcane recipes in Latin, marginal notes that look like someone’s grocery list, and little diagrams that hint at how people once tried to make sense of the natural world. Those tiny archival details are what make her magical scenes feel lived-in.

On top of that, she wove in her knowledge of the history of science so the supernatural elements sit next to actual scientific inquiry rather than hovering above it. In interviews she mentions time spent in the Bodleian and other libraries, consulting rare collections, talking to curators, and following leads from one old book to another. She also maps real places — Oxford streets, specific college libraries — so the setting is as much research as it is atmosphere. The result is that the magic in the books feels researched, rescued, and lovingly recontextualized rather than invented out of whole cloth, which is why the world feels both scholarly and mysteriously human. Honestly, those research bones are a big part of why I keep rereading the trilogy.

To get under the skin of Deborah Harkness’s research, I looked at how her life as a historian of science bleeds into every sentence of 'a discovery of witches' and the rest of the 'All Souls Trilogy'. She didn’t invent a whimsical version of magic out of thin air — she built it from real historical materials. I can picture her in reading rooms, sleeves rolled up, transcribing marginalia from Renaissance manuscripts, poring over the notebooks of figures like John Dee and the collectors whose names appear in the novels. Her academic work, especially 'The Jewel House', shows how she studies how people in Elizabethan and early modern Europe organized and talked about knowledge; that approach gives the supernatural elements a tangible texture.

Beyond primary sources, I know she dug into the history of alchemy, herbalism, astrology, and medical recipes. She uses real pamphlets, herbals, and treatises as scaffolding — the kinds of books that sit unglamorously on dusty shelves but are goldmines for sensory detail: lab apparatus, pigments, the smell of cinnabar, the precise language of a 17th-century apothecary. She also leaned on modern science to ground vampires and witches in quasi-plausible biological terms, blending genetics and chemistry with old-world occultism so the magic feels like a hidden branch of knowledge rather than pure fantasy. Librarians, curators, and colleagues in science and history likely helped her navigate archives and decode difficult scripts.

Reading her novels, I felt the archive come alive: catalogue references, manuscript quirks, and the lived routines of scholarship. That painstaking, bookish research gives the story authority — you can almost reach out and touch the vellum. For me, the coolest part is how scholarly obsession becomes the beating heart of the magic itself; it’s academic romance and occult history braided together, which I find irresistibly smart and cozy.

I like thinking of her research as detective work in dusty libraries: she follows clues in old Margins and maps them onto modern ideas. Harkness read widely in early modern history — alchemical manuals, herbals, and the notes of figures like John Dee — and used those sources as raw material. She’s trained to read old handwriting and to interpret how people described nature before modern science split things apart, so she could plausibly stitch magic into history.

She also mixed in contemporary science to make supernatural traits feel grounded: a dash of genetics here, a pinch of chemistry there, so vampires and witches don’t feel mythic only but almost scientific. Consulting archives, working with librarians, and leaning on her own scholarship let her blur the line between myth and documented practice. I find that blend of archival rigor and imaginative leap deeply satisfying — it makes the world feel lived-in and stubbornly believable.