Two green-skinned children appeared near a medieval English village

Why this is not simply a fairy tale

The instinct to wave the story away as a medieval marvel runs into an awkward fact: the two men who recorded it were not credulous. William of Newburgh, an Augustinian canon at Newburgh Priory in Yorkshire writing his Historia rerum Anglicarum around the 1190s, was one of the sharpest critics of his age. He is best remembered for pouring scorn on the fantastical History of the Kings of Britain by Geoffrey of Monmouth, which he called a tissue of impudent lies. This is not an author who repeated every wonder he heard. Of the Green Children he writes that he had long doubted the story, at first finding it “absurd to accept as genuine” on any rational foundation, before the weight of “so many and such competent witnesses,” in his own phrase, left him “compelled to believe” it.

Ralph of Coggeshall, abbot of the Cistercian house at Coggeshall in Essex, gives the fuller version in his Chronicon Anglicanum, and, crucially, claims a line of transmission: he says he had heard the story more than once from Sir Richard de Calne's own household, the very family that took the children in. Two independent chronicles, one of them tracing back toward the named household at the center of events, is a documentary footing that ordinary folklore does not have. Robin Hood and the fairies of the hollow hills do not come with a knight's address attached.

Then there is the texture of the details. The most memorable elements are not the grand ones but the small, un-magical ones: children splitting bean-stalks looking for food in the wrong place, a boy who simply wastes away, a girl judged a little too free with herself, a marriage in a specific market town. Invented marvels tend to escalate toward wonder; this one keeps deflating toward the everyday. That downward pull, away from spectacle and toward the mundane and even the unflattering, is the kind of thing that is easier to explain as the residue of a real, poorly understood event than as the design of a storyteller.

That scholarly seriousness has not faded with time. In 2024 John Clark (for decades the curator of medieval collections at the Museum of London) published a 260-page monograph on the case through the University of Exeter Press, treating the two chronicles as primary sources worth forensic reading rather than folklore to be set aside. A story that can still fill a specialist academic book eight and a half centuries later is not one historians have quietly agreed to file away as invented.

The case for something real behind the legend is strengthened, too, by how well specific, non-magical explanations fit its details. Suffolk historians have long noted that Fornham St Martin, a few miles from Woolpit, held a community of Flemish cloth-workers in the twelfth century, and that on 17 October 1173 a royal army all but destroyed a rebel force built around several thousand Flemish mercenaries fording the River Lark near Fornham, with local peasants reportedly killing most of the survivors in the surrounding marsh. In a 1998 Fortean Studies essay, Paul Harris proposed that children orphaned in that violence (speaking a Low Germanic dialect unintelligible to Suffolk harvesters, disoriented after fleeing through the region's old flint workings, emerging dazed into daylight) would fit the account's central strangeness point for point, right down to a homeland named for the parish of St Martin nearby. Their gaunt, malnourished pallor is well matched by chlorosis, a genuine iron-deficiency condition nicknamed “the green sickness,” which can lend the skin a greenish cast and recedes as diet improves, precisely the arc the surviving girl is said to have followed. A thinner, more folkloric strand of local tradition, set down by the Suffolk folk singer and writer Bob Roberts in his 1978 book A Slice of Suffolk, instead ties the children to the region's own “Babes in the Wood” story, with arsenic poisoning by a guilty guardian offered as an alternative source of the green tinge. None of these readings can be proven outright, but the fact that historians keep finding concrete, checkable, unmagical candidates that fit so many particulars at once is itself a reason to think something specific and real, rather than an invented fantasy, lies beneath the story.

The rational reading: orphans, hunger, and a river

The most economical explanation strips the marvel out entirely. In a 1998 essay in Fortean Studies, the researcher Paul Harris argued that the Green Children were the orphaned children of Flemish immigrants. In the 12th century, East Anglia held a sizeable and resented Flemish population: weavers and mercenaries who had settled under Norman patronage. After the failed 1173 rebellion against Henry II, the Battle of Fornham was fought near Bury St Edmunds, and the reprisals that followed fell heavily on Flemish settlers in the surrounding country. Children orphaned in that upheaval, Harris suggested, might have fled into the woods and, by one route or another, arrived starving and terrified at Woolpit.

The pieces fall into place with some elegance. Flemish is a Low Germanic tongue that would have been simply unintelligible to Suffolk farmhands, hence the “unknown language.” Nearby Fornham St Martin offers a real-world “St Martin's Land.” The River Lark fits the broad river the girl described bordering her homeland. Harris even proposed that disoriented children might have blundered through the region's old flint mine workings (the underground passage of the legend) before emerging, blinded by the sun, into the fields. The green skin, on this account, is chlorosis: a dietary iron-deficiency anemia, long known as “the green sickness,” that can lend the skin a greenish pallor and clears up once the sufferer eats properly, which is exactly when the girl's color is said to have faded.

The reading is attractive but not clean. Its most serious problem is the calendar: the Battle of Fornham was fought in 1173, under Henry II, whereas William of Newburgh firmly places the children in the reign of King Stephen, who died in 1154, nearly two decades earlier. Ralph does set the episode under Henry II, so one can save the theory by preferring his dating over William's, but that means choosing which chronicler to trust to make the pieces fit. Beyond the dating, every physical trace is gone: there is no grave, no parish record, no artifact: nothing to examine but two manuscripts written down decades after the events they describe, and already shaped by an unknown amount of retelling. The Flemish-orphan hypothesis explains the story well; it cannot prove it, and it should not be mistaken for a solved case.

Even the best-fitting pieces of the naturalistic case draw serious pushback. Researchers including Brian Haughton have pointed out that Richard de Calne was an educated, propertied knight in a region with a substantial Flemish population, which makes it hard to believe he or his household would have failed to recognize Flemish speech as Flemish, even without understanding a word of it, undercutting the chronicles' premise that the children's speech was entirely unrecognizable to everyone who heard it. The researcher Michał Madej has pressed the chlorosis diagnosis just as hard from the other direction: if malnutrition-driven “green sickness” explains these two children, comparably underfed children and adults across a hungry century should have shown the same greenish pallor, yet no other contemporary record mentions crowds of green-tinged poor, and even physicians who took chlorosis seriously conceded that its complexion was, in one 18th-century physician's words, “rarely or ever a true Green,” only bordering on that hue. The arsenic-poisoning variant fares no better under scrutiny: it survives only as a strand of modern local tradition, first set down by the Suffolk folk singer and writer Bob Roberts in 1978 and entangled with the separate “Babes in the Wood” legend rather than traceable to any medieval source, and it offers no account at all of the one detail every chronicle agrees on: that the children would eat nothing at first but raw beans.

Green folk and visitors from elsewhere

Long before anyone reached for chlorosis and Flemish weavers, the Green Children belonged to folklore, and that is still how much of the world meets them. Nearly every element of the tale rhymes with the fairy traditions of the British Isles and beyond: a subterranean otherworld of perpetual twilight; inhabitants marked out by an unnatural color; a taboo or trance around food; entry and exit through a cavern or hollow in the earth. Green itself is the fairy color par excellence, the shade of the Good Folk and the green man of seasonal ritual. Read this way, the children are not refugees at all but wanderers from Faerie who strayed across a boundary that is normally sealed.

The story has never stopped attracting new frames. The 17th-century scholar Robert Burton cited it in The Anatomy of Melancholy as a case of beings who might have “fallen from Heaven.” In the modern era the astronomer Duncan Lunan proposed, in Children from the Sky (2012), that the pair were extraterrestrials accidentally teleported to Earth, the twilight land recast as another planet. The historian John Clark, in a 2006 essay in Science Fiction Studies pointedly titled “Small, Vulnerable ETs,” traced how the tale has been perpetually reinterpreted to fit whatever otherworld a given century found most plausible: fairyland, then Heaven, then outer space.

That adaptability is itself the clue to the story's endurance. A tale of two green children who came from somewhere else is an almost perfect vessel: concrete enough to feel like reportage, open enough to pour any meaning into. It survives not because any one interpretation has won, but because it refuses to close, and each generation, finding the door still ajar, walks its own strangers through it.