Historians still can't name what killed Shakespeare's son: how much of "Hamnet" is actually true

The answer, it turns out, is deeply unsatisfying in the most interesting way possible. Because the honest historical record of Hamnet Shakespeare's entire life fits on a Post-it note.

What we actually know (it's two lines in a church register)

Hamnet Shakespeare, only son of William and the twin brother of Judith, was baptized in Stratford-upon-Avon in 1585 and buried there in August 1596, at age 11. That's it. That's the archive. Nearly everything else about him has been reverse-engineered from context by historians doing their best forensic work on a boy who left behind exactly two entries in a parish register.

The film — and Maggie O'Farrell's novel it's built on, which is literally subtitled A Novel of the Plague — gives him a cause of death: bubonic plague, arriving via a flea, via a monkey, via a ship, in one of the book's most celebrated chapters. Gorgeous writing. Also: an educated guess dressed as a fact.

The plague theory has a paperwork problem

Here's where the archivists come in and ruin everything, as is their sacred duty. The burial records from Stratford that August don't look like plague records. Amy Hurst, an archivist at the Shakespeare Birthplace Trust, went through the register and found five burials that month — a perfectly ordinary number. As she put it:

"It suggests that there was no health epidemic, so not plague."

So what did kill an 11-year-old in Elizabethan Stratford? Pick your horror:

• Dysentery or typhus — both regulars in town at the time, neither of which makes for a lyrical novel chapter;
• A congenital condition — Germaine Greer's theory, floated in her book Shakespeare's Wife;
• Literally anything else — because roughly one in three children then didn't live to see 10, and nobody wrote down why.

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And the Hamlet connection? Complicated

The film's whole emotional engine — grieving father writes Hamlet for his dead son — leans on two real facts: Hamnet and Hamlet were interchangeable spellings of the same name, and the play arrived a few years after the boy's death. Compelling! Except Hamlet is an adaptation of a centuries-old Scandinavian legend about a prince named Amleth, which Shakespeare didn't invent so much as renovate.

Some scholars, including Stephen Greenblatt, hear the grief elsewhere — in King John, likely written the very year Hamnet died, where a mother mourns her son with the line "Grief fills the room up of my absent child." Others point out that right after the funeral, Shakespeare wrote some of his sunniest comedies, which is either proof he wasn't wrecked or the most relatable coping mechanism in literary history.

The movie isn't a documentary and never claimed to be. It's a beautiful "what if" built on a gap in the record — and the gap is the point. Bring tissues anyway.

Previously we wrote: Who plays Dumbledore in HBO's Harry Potter? The casting, and the actor's own words on why saying yes took time