In 1152, King Stephen of England very nearly killed a five-year-old boy.

He would have been far from the first child to die on Stephen’s account, because at this point England was fourteen years into a civil war so brutal that the Peterborough Chronicle recorded that men “said openly that Christ slept” (þa sæden openlice ðæt Crist slep. ⁊ his halechen),¹ but this time was different. This time, the king had to order the boy’s death himself.

The medieval English royal succession was never as neat as Crusader Kings mechanics would have you believe, but even so Stephen I (and only) was an unlikely king. His mother Adela was the youngest child of William the Conqueror. She had four older brothers, three of whom survived their father, and Stephen himself was the third of her sons. But the Conqueror’s eldest son, Robert Curthose, mortgaged his duchy of Normandy to fund his participation in the First Crusade and would go on to spend the decades after his return in comfortable captivity. His second son, Richard, was killed as a teenager in a hunting accident in the New Forest in 1070, and his third son, William Rufus, succeeded him as king, never married, and was also killed in a hunting accident in the New Forest (this time in 1100). If this seems suspiciously convenient, it was: the youngest brother, Henry, was also on the fatal hunting trip. He immediately rode hard for Winchester, where he was crowned three days later.

Henry I promptly married Matilda, whose father was the king of Scotland and whose mother Margaret (later canonized by Innocent IV) was the sister of Edgar Ætheling: Henry and Matilda’s son William, born in 1103, united the blood of the Norman conquerors and the old Anglo-Saxon House of Wessex. Their daughter, another Matilda, was sent off to Germany at the age of eight to marry the twenty four-year-old Holy Roman Emperor Henry V. And that was it: Henry I also fathered at least twenty-two attested bastards, but William and Matilda were his only legitimate children. Which meant that when a drunken helmsman wrecked the ship carrying William and at least three hundred other flowers of the Anglo-Norman nobility across the Channel, Henry was in deep trouble. Luckily for him, his daughter soon returned from Germany a childless widow and once he had remarried her to Geoffrey of Anjou he was able to browbeat his barons into accepting her as his heir. Unluckily for him, they didn’t mean it: Empress Matilda was deeply unpopular even beyond the fact that she was a woman, and as soon as Henry died they were happy to crown his nephew Stephen instead.

The ensuing civil war, known to history as “the Anarchy,” was exciting and dramatic and featured such moments as a king captured on the battlefield, a queen climbing out the window of a besieged castle and escaping through a snowstorm, and a teenage boy invading England with a mercenary army he couldn’t afford to pay. For our purposes, though, all you really need to know is that in 1152 Stephen laid siege to a castle in Berkshire that John Marshal, a supporter of Matilda, had built without royal authorization. (These are apparently called “adulterine castles“, which I think is delightful.) Marshal asked for a truce to consult with his constable and organize the garrison’s surrender and offered his youngest son William as a hostage for his good behavior. Stephen accepted, took the boy into his camp, and withdrew to let Marshal enter with his men.

And then John Marshal stayed in the newly-reinforced castle instead.

Using your children as diplomatic hostages was standard practice in this era. Abandoning them to be executed as punishment for your bad faith was definitely not. But when Stephen’s men told John Marshal that his son’s life would be forfeit for his treachery, Marshal is said to have replied that he didn’t care, because he still had “the anvils and the hammers to forge even finer ones”. Stephen was not, in the end, able to bring himself to kill young William: the story has it that he lost his nerve when the boy asked on his way to the gallows whether he could play with a guard’s spear “afterwards”, and then again when William happily climbed into the catapult they planned to use to send him over the walls to his father (he thought it was a swing). He did, however, remain a hostage in Stephen’s camp until the end of the war a year later.²

Our only source for this story of William’s childhood, and for most of the truly excellent stories medievalist Thomas Asbridge recounts in The Greatest Knight, is a 19,215 line rhyming poem in medieval French. Probably composed a few years after William Marshal’s death at the behest of his friends or children, and pretty well corroborated by other sources where other sources exist, the poem is our only surviving example of a medieval biography of a “normal” person. (Relatively speaking; that little boy grew up to be an incredibly accomplished man but neither a king nor a saint, which is who usually got written about.) Moreover, it seems to have been compiled from stories told by people who actually knew him — which probably means that he was the one who told them about the child who thought the catapult was a swing. The poem exists in only one manuscript,³ discovered by Paul Meyer in the late 19th century and published with partial translations into modern French as L’histoire de Guillaume le Maréchal. (You can find Meyer’s version here or here.) More recently, Nigel Bryant published a full English translation, the text of which isn’t available online, though I’ll point out that even Claude Sonnet does a pretty decent job with screencaps of the original.⁴

Jane Psmith, “REVIEW: The Greatest Knight by Thomas Asbridge”, Mr. and Mrs. Psmith’s Bookshelf, 2026-04-27.

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1. As a measure of the degradation of the times, the chroniclers’ English no longer employed grammatical gender.

The ⁊ is a Tironian note for “and”, incidentally, and halechen is obviously cognate with “hallowed”. Like and subscribe for more Old English in the least expected places.

2. Stephen’s son and heir Eustace having died by this point, it was agreed that he would keep the English throne but be succeeded by Matilda’s son, the future Henry II, who had already conquered Stephen’s duchy of Normandy.
3. Yes, like Beowulf. It’s depressing to realize how many incredible medieval texts survive in only one manuscript. Thank a Benedictine today!
4. Claim not verified by anyone who actually reads medieval French, but I didn’t see any obvious errors.