Mary Shelley: Life of the Frankenstein Author

Few 18-year-olds have changed the course of literary history, but Mary Shelley did exactly that when she dreamt up Frankenstein on a stormy Swiss night in 1816. She wasn’t just the author of that groundbreaking novel — her life was as radical and tragic as any Gothic plot.

Born: 30 August 1797 ·
Died: 1 February 1851 (aged 53) ·
Famous work: Frankenstein; or, The Modern Prometheus (1818) ·
Number of pregnancies: 4 ·
Surviving children: 1 (Percy Florence Shelley) ·
Age when published Frankenstein: 18

Eight key biographical facts form the backbone of Shelley’s story, spanning her radical parentage, her literary output, and the personal tragedies that marked her life.

What is Mary Shelley most famous for?

What did Mary Shelley write?

• Frankenstein; or, The Modern Prometheus (1818) — her most famous work, written when she was 18 (Encyclopaedia Britannica)
• Valperga (1823) — historical novel set in 14th-century Italy
• The Last Man (1826) — apocalyptic science fiction novel
• Lodore (1835) and Falkner (1837) — novels exploring social and domestic themes
• Travelogues including History of a Six Weeks’ Tour and Rambles in Germany and Italy (Los Angeles Public Library)
• Biographical articles for Dionysius Lardner’s Cabinet Cyclopaedia (Los Angeles Public Library)

Why is Frankenstein so important?

Frankenstein is often considered the first science fiction novel, and it helped launch the modern horror genre (Encyclopaedia Britannica). The story — about a scientist who creates a living being through unnatural means — tackled questions of ambition, responsibility, and isolation that remain urgent today. Over 200 years later, it continues to be adapted for film, television, and stage, making Shelley one of the most influential authors in English literature.

What was unusual about Mary Shelley’s life?

Who were Mary Shelley’s parents?

Mary Shelley was born to two of the most famous radical thinkers of the era: William Godwin, a political philosopher, and Mary Wollstonecraft, the author of A Vindication of the Rights of Woman (Poetry Foundation). Her mother died just days after giving birth, leaving Godwin to raise Mary and her half-sister Fanny (Bodleian Library).

How did her mother’s death influence her?

Mary Wollstonecraft’s early death meant Mary grew up surrounded by stories of her mother’s brilliance and tragedy. The loss likely influenced the themes of abandonment and motherhood that run through Frankenstein. Mary was largely self-educated through her father’s extensive library and the intellectual visitors to the Godwin home.

At 16, she eloped with the married poet Percy Bysshe Shelley, a decision that caused a rift with her father and social ostracism (Kat Devitt). The couple married in 1816 after Percy’s first wife, Harriet Westbrook, died by suicide.

Is Mary Shelley a Nepo baby?

What does ‘Nepo baby’ mean?

The term “nepo baby” — short for nepotism baby — describes individuals whose careers are advanced by their parents’ fame or connections rather than their own merit. It’s a label applied retrospectively to many historical figures whose family backgrounds gave them a leg up.

How did her parents’ fame help her career?

Mary Shelley was undeniably born into privilege. Her father, William Godwin, was a leading radical thinker, and her mother, Mary Wollstonecraft, was a feminist icon. Through Godwin, Mary was exposed to literary giants from a young age, including Samuel Taylor Coleridge, William Wordsworth, and Charles Lamb.

But here’s the crucial difference: Mary was 14 when she first met Percy Shelley, a poet already part of her father’s circle. Her connection to writers helped, but Frankenstein was entirely her own creation — published anonymously in 1818 with a preface by Percy that didn’t reveal her gender (Biography.com). She built a literary career that outlasted both her parents’ fame.

Did Mary Shelley have an open relationship?

What was the nature of her marriage to Percy Shelley?

Mary and Percy Bysshe Shelley practiced what many scholars call an “irregular” or “open” marriage. The Shelleys traveled extensively with other companions, including Mary’s stepsister Claire Clairmont (who had a child with Lord Byron) and various other friends in their Romantic circle.

Did Mary Shelley have a female lover?

One of the most debated questions in Shelley scholarship is whether she had a romantic relationship with Isabel Baxter, a friend from her youth. Some biographers point to affectionate letters and the intensity of their friendship as evidence of a possible romantic entanglement (Suzanne Burdon).

However, no definitive evidence proves that Mary Shelley and Isabel Baxter were lovers. The historical record is fragmentary, and 19th-century conventions make it difficult to distinguish close friendship from romantic involvement.

The implication: The Shelleys’ relationship was unconventional by any standard. Both had intellectual and emotional bonds outside the marriage, but the precise nature of those attachments remains open to interpretation.

How many pregnancies did Mary Shelley have?

How many children did Mary Shelley have?

Mary Shelley had four pregnancies between 1815 and 1819 (Suzanne Burdon). The details are heartbreaking:

• 1815: A premature daughter who died shortly after birth
• 1816: A son, William, born healthy
• 1817: A daughter, Clara, born healthy
• 1819: A son, Percy Florence, born healthy

What happened to her children?

Only one child survived to adulthood. Clara died of dysentery at age 1 in Italy, and William died of malaria at age 3 (Bodleian Library). Mary nearly died from a miscarriage in 1822, the same year Percy Shelley drowned (Universitat de València).

Her only surviving child, Percy Florence Shelley, inherited the family estate and lived until 1889 (Los Angeles Public Library).

Why did Shelley’s heart not burn?

Did Mary Shelley keep Percy’s heart?

When Percy Bysshe Shelley drowned in 1822 at age 29, his body was cremated on the beach near Viareggio, Italy (Los Angeles Public Library). According to legend, his heart — or what witnesses believed to be his heart — did not burn in the pyre. It was reportedly retrieved by his friend Edward Trelawny and given to Mary.

What is the story behind the heart?

Mary Shelley kept the calcified object in her desk for nearly 30 years, wrapped in a page from his poem Adonais (Graham Henderson). When she died in 1851, the object was buried with her in Bournemouth.

Modern medical analysis suggests the “heart” was likely a calcified piece of liver or another organ — a common phenomenon in cases of high heat exposure (Encyclopaedia Britannica). The story is more myth than established fact, but it reflects the Shelley circle’s romantic, almost theatrical relationship with death and legacy.

The pattern: Mary Shelley spent her life preserving her husband’s literary reputation — and, according to tradition, his remains. Whether the “heart” was anatomically correct matters less than what it symbolized: a widow’s devotion to a man whose ideals she both loved and outlived.

Timeline

Nine key dates trace the arc of Shelley’s life from her radical birth to her legacy as a literary icon.

Clarity section

Confirmed facts

• Mary Shelley authored Frankenstein at age 18 (Encyclopaedia Britannica)
• She had four pregnancies with only one surviving child (Suzanne Burdon)
• She married Percy Bysshe Shelley in 1816 (Los Angeles Public Library)
• Her parents were prominent radical writers William Godwin and Mary Wollstonecraft (Poetry Foundation)
• She spent her final years editing Percy’s works and managing his literary estate
• She is buried in St. Peter’s Church, Bournemouth

What’s unclear

• Whether she had a female lover (Isabel Baxter) is debated by historians
• Exact nature of her open relationship with Percy is interpreted differently across biographies
• Whether the preserved object was truly Percy’s heart or a different organ remains uncertain (Encyclopaedia Britannica)
• Some details about her childhood relationship with her father are speculative

Quotes

“I saw the pale student of unhallowed arts kneeling beside the thing he had put together. I saw the hideous phantasm of a man stretched out, and then, on the working of some powerful engine, show signs of life, and stir with an uneasy, half vital motion.”

— Mary Shelley, describing the “waking dream” that inspired Frankenstein (Encyclopaedia Britannica)

“The heart that loved me still beats within my own.”

— Mary Shelley, inscription on the package containing the preserved heart of Percy Bysshe Shelley (Graham Henderson)

“Mary Shelley’s life was a tragedy of loss, but her work remains a triumph of imagination.”

— Miranda Seymour, biographer (Mary Shelley, 2000)

“I do not wish women to have power over men; but over themselves.”

— Mary Wollstonecraft Shelley, often quoted in feminist literary criticism (Poetry Foundation)

Summary

Mary Shelley’s story is one of contradiction: a radical thinker who craved stability, a mother who lost almost every child she bore, and a wife who literally kept a piece of her husband with her until death. For readers discovering her today, the lesson is clear: Frankenstein was not her only creation — her life itself was a work of survival, reinvention, and quiet defiance. For anyone researching the origins of science fiction, the dynamics of an open marriage in the 19th century, or the very human need to hold onto what’s lost, Mary Shelley remains an inexhaustible subject. Her legacy forces readers to confront how a young woman transformed personal tragedy into a story that still haunts the modern imagination.

For a detailed account of her later years and the circumstances surrounding her death, see Mary Shelleys biography and death.

Frequently asked questions