The Canterbury rune charm is an Old Norse healing spell written in runes in the margin of an English manuscript from Christ Church, Canterbury – added shortly after 1073 and now London, British Library, Cotton Caligula A XV. It orders a disease being called Gyrill's "wound-stirrer" to leave, calls on Thor, and is labelled as a remedy against "vein-pus", a spreading, festering infection. Here is the text, what is certain and what is not in its translation, and why a copper amulet from Sweden uses almost the same words.
Picture a page that is, on the whole, thoroughly well-behaved. Easter tables, lunar days, calculations for the church calendar, year-by-year notes on archbishops and kings. A working book made by monks for monks, in Canterbury, the spiritual heart of England. And then, down in the bottom margin, a line that does not belong. Runes instead of Latin letters. Old Norse instead of English. And not a saint's name, but one nobody would expect here: Þórr.
That line is known as the Canterbury rune charm, or simply the Canterbury charm. It runs to barely thirty words. Yet it opens a door onto a world in which cloister, calendar and liturgical year sat quite comfortably beside a thunder god who split giants' skulls. And it has relatives – on copper plates and bones from Sweden and Denmark.
The shelfmark sounds like filing-cabinet jargon: London, British Library, Cotton Caligula A XV. It comes from Sir Robert Cotton, the seventeenth-century collector whose bookcases were named after the busts of Roman emperors placed on them. Behind that dry label lies a composite volume bound together from very different parts. The front, older section dates from the eighth and ninth centuries and came to England from north-eastern France. The back section, from roughly folio 120 onwards, is English and belongs to the eleventh century.
That later section is the one that matters here. According to current manuscript scholarship, at least part of it was written at Christ Church, Canterbury's cathedral priory. It contains what a monastic community needed for daily life: computus (the reckoning of Easter and the movable feasts), notes on services, a table of years, the Christ Church annals, lunar prognostics – and blessings and healing charms in Latin and Old English.
The charm was not "carved", as you sometimes read. Runes were a script for cutting into wood, bone, metal and stone. Here, however, someone wrote runes on parchment with pen and ink. A working spell in runes in the middle of an English monastic book is a genuine rarity.
Why Canterbury of all places? In 1011 Danish forces took the city and carried off Archbishop Ælfheah (Alphege); the following year he was killed at Greenwich by drunken warriors. A few years later a Dane, Cnut the Great, sat on the English throne – and he became a patron of Christ Church, having Ælfheah's remains solemnly translated to Canterbury in 1023 and granting the cathedral gifts.
Add to this the broad hinterland of Scandinavian settlement in northern and eastern England, the Danelaw. Then 1066 brought William the Conqueror and the next upheaval; from 1070 the Italian-born Lanfranc was Archbishop of Canterbury. For the wider story, see our overview of the Vikings in England.
A Scandinavian healing formula fits this setting surprisingly well. Who entered it, we do not know. Some scholars think the text itself may be older than the manuscript and may come from the East Norse – Danish or Swedish – speech area. That is plausible but not proven.
The runes are clearly legible and the transcription itself is not in dispute. In the usual transliteration (runes rendered letter by letter in the Latin alphabet) it reads:
kuril sarþuara far þu nu funtin is tu þur uigi þik þorsa trutin iuril sarþuara uiþr aþra uariCanterbury rune charm, British Library, Cotton Caligula A XV, transliteration
Normalised into standard Old Norse dictionary spelling, that gives roughly: Gyrils sárþvara, far þú nú! Fundinn ertu. Þórr vígi þik, þursa dróttinn! Gyrils sárþvara. Viðr æðravari. Our own, deliberately literal rendering:
Gyrill's wound-stirrer, go away now! You are found. May Thor hallow you, lord of the thurses! Gyrill's wound-stirrer. Against vein-pus.Our own translation of the normalised reading
Word by word:
Gyril / Gyrill. The first time the name is spelled kuril, the second time iuril. The runic script did not distinguish k from g, hence the reading "Gyril". What the name means, nobody knows for sure. It is usually taken as the name of a giant or disease demon whose "wound-stirrer" is being addressed.
sárþvara. Sár is a wound, þvara a stirring stick, the kind used for porridge. A "wound-stirrer" would be something that churns and bores in the wound – a vivid image for throbbing, gnawing pain. English versions range from "wound-tap" to "wound-causer"; both are interpretations rather than dictionary certainties.
far þú nú, fundinn ertu. "Go now, you are found." This is the heart of many banishing spells: whoever names and exposes the evil gains power over it.
Þórr vígi þik. "May Thor hallow you." More on this shortly – these three words are the real sensation.
þursa dróttinn. "Lord of the thurses." Þurs is an old word for a giant, often with the ring of fiend or bringer of harm (see our article on the giants). Dróttinn is a war-band leader, a lord.
viðr æðravari. "Against vein-pus." Æðr is a vein, var a fluid, here most likely pus. What is probably meant is an inflamed, festering wound whose infection is spreading – in modern terms perhaps blood poisoning. This last line is the label on the bottle: what the charm is for.
Here we have to correct our own earlier version of this article. It said Thor was invoked as "lord of the thurses" because he was their great vanquisher. That is possible, but it is not the most likely reading.
Look at the grammar: Þórr vígi þik, þursa dróttinn. "Þik", "you", is the being addressed – the disease demon that has just been ordered to leave. "Þursa dróttinn" stands right beside it and reads like a form of address to that "you": may Thor hallow you, you lord of the thurses. The demon is itself the prince of fiends, and Thor is being sent against it.
The strongest argument for this comes from a copper plate from Sweden, which we will look at in a moment. Its first line reads: Þurs sárriðu, þursa dróttinn! – "Thurs of the wound-fever, lord of the thurses!" There is no doubt there: "lord of the thurses" addresses the disease being, not a god. That is why Canterbury is now usually read the same way.
The phrase Þórr vígi, "may Thor hallow", was not invented by our scribe. It had stood on Danish and Swedish runestones for generations. The Glavendrup stone on Funen, one of the great monuments of the tenth century, ends with Þórr vígi þessi rúnar – "may Thor hallow these runes". The Virring stone in Jutland closes with "may Thor hallow this monument", the Sønder Kirkeby stone on Falster with "may Thor hallow the runes", and the formula also appears on the Velanda stone in Västergötland.
On the stones it places the monument and its inscription under Thor's protection. In the Canterbury charm, however, the thing being "hallowed" is a demon. What does that mean?
The myths help. Vígja is the very verb Snorri Sturluson uses for Thor's hammer acts. In Gylfaginning, Thor slaughters his two goats for supper on a journey and brings them back to life next morning by hallowing their hides with Mjölnir. At Baldr's funeral he steps up to the pyre and hallows it with the hammer. In Þrymskviða the hammer is to be laid in the "bride's" lap to hallow the marriage. With Thor, hallowing is no gentle blessing; it is something done with the hammer Mjölnir – whose main job is smashing giants' skulls.
So it is quite possible that "may Thor hallow you" carried a very unpleasant punchline for the demon: it is not being blessed, it is being put under the hammer. That reading is not certain, but it fits the logic of the spell.
Thor is not a healing god in the sources. No Eddic stanza shows him binding wounds, no skald praises his medicine. Mindy MacLeod and Bernard Mees make exactly this point in their standard book on runic amulets: Thor's role in the charm comes not from medicine but from his enmity towards giants and his function as protector of humankind.
That function is well attested. Snorri tells how the gods need only call Thor's name when a giant rampages in Asgard, and he is already standing in the hall with his hammer raised – as happens in the quarrel with Hrungnir. Two skaldic stanzas preserved by Snorri in Skáldskaparmál consist almost entirely of a list of giants and giantesses whose bones Thor broke or whose skulls he smashed. For more on the god himself, read our portrait Thor – thunder over Midgard.
And in many people's minds, illness belonged precisely to that hostile outside world. It came from unfriendly beings: giants, dwarfs, elves, witches. Old English speaks of "shot" – a charm against a sudden stitch names the shot of the gods, of elves and of witches. If a thurs sits in your flesh and makes the wound fester, you do not send for the barber; you call the giant-killer.
In March 1931 a copper plate came to light in Sigtuna, the early royal town on Lake Mälaren, in the Granhäcken block. It is about 8 centimetres long and under 3 centimetres wide, and both sides carry Younger Futhark runes. It is dated to the eleventh century – roughly the period of the Canterbury charm.
In Sofia Pereswetoff-Morath's 2019 reading the first side begins: Þurs sárriðu, þursa dróttinn! Flý þú nú! Fundinn es. – in sense: "Thurs of the wound-fever, lord of the thurses! Flee now! You are found." The second side threatens a "wolf" with three torments and nine needs, contains a row of íss runes (ice runes, perhaps meant to "freeze" the evil in place), and ends with Njót lyfja! – "Make use of the healing charm!"
| Element | Canterbury | Sigtuna amulet |
|---|---|---|
| Disease being | Gyrill's "wound-stirrer" | thurs of the "wound-fever" |
| Address | þursa dróttinn | þursa dróttinn |
| Command | far þú nú – go now | flý þú nú – flee now |
| Exposure | fundinn ertu | fundinn es |
| Divine help | Þórr vígi þik | no god named, threat formulas instead |
This is no coincidence. In the eleventh century there was a fixed formula that travelled across the sea – by word of mouth, on metal, on parchment. Canterbury is an English offshoot of a Scandinavian healing tradition.
In 1996 Sigtuna produced another find: a cattle rib inscribed on both sides with more than a hundred runes, found in excavations in the Professorn block and dated by stratigraphy to the late eleventh or early twelfth century. The runologist Helmer Gustavson published a detailed interpretation in 2010. Here, too, a disease being is to be driven out of a person, and here, too, fever is mentioned.
The name is where it gets exciting. On the rib a being appears whose name is read as Iorils. Gustavson linked it to Canterbury's Gyril/Iuril – remember that the second spelling in Canterbury is iuril. In 2012 Magnus Källström disagreed, treating the Sigtuna name rather as a separate word, possibly related to an old word for water. Who is right remains open.
Thor's appearance in the Canterbury charm has a parallel too. In the 1950s, near the village of Södra Kvinneby on the island of Öland, a small square copper plate was found, about 5 by 5 centimetres, with a hole for hanging it round the neck. It carries some 140 runes and an incised fish. It is dated to roughly 1050–1130, so it is more or less contemporary with Canterbury rather than clearly older, as our earlier version claimed.
The text is difficult and has been read in very different ways. There is broad agreement on one core sentence: may Thor protect a man named Bófi with the hammer that came from the sea. Some scholars see an allusion to Thor's fishing trip, when he hooked the World Serpent; older readings also found a disease demon in the text that newer readings no longer confirm.
Together, Kvinneby and Canterbury show that even in officially Christian eleventh-century Scandinavia and England, Thor was regarded in private protective spells as tried-and-tested help against harm.
How old this kind of spell is in the North is shown by Ribe in Jutland, Denmark's oldest town. In 1973 a piece of human skull roof was found there, about 6 by 8.5 centimetres, with a drilled hole and a runic inscription. It is dated to the eighth century, around 725, making it one of the earliest witnesses of the Younger Futhark.
The inscription names Ulfr, Odin and "High-Tyr" and asks for help against an evil. It used to be read as "against this pain"; in 2021 the runologist Jackie Nordström showed that the decisive passage more likely speaks of a dwarf and a female dwarf. That fits perfectly with an idea also known from England: dwarfs as causes of illness, especially fever. Old English has a charm of its own "against a dwarf". Read more in our article on dwarfs as demons of disease.
A good five hundred years younger is the Ribe healing stick, a pinewood stick from around 1300 bearing a long runic charm. It opens by invoking Earth and "high heaven", the sun, Saint Mary and the Lord God, asks for "healing hands" and a "healing tongue" against "the trembler", apparently a fever, and mentions a black stone in the sea on which nine needs lie. It ends with "Amen". We have already met the "nine needs" on the Sigtuna amulet, and the "healing hands" recall the Eddic poem Sigrdrífumál.
It would be too simple to read the Canterbury charm as secret heathenism smuggled into a cathedral book. Medieval medicine was a field in which prayer, herbs, blessings and spells stood side by side as a matter of course. English medical books such as Bald's Leechbook (tenth century) or the collection known as Lacnunga mix drug recipes, herbs, Latin prayers and Old English incantations. In the famous Nine Herbs Charm even Woden appears, taking nine "glory-twigs" and striking a serpent with them.
Cotton Caligula A XV itself contains other blessings and healing charms in Latin and Old English besides the runic one. A scribe who noted such things down did not see himself as a heretic but as someone collecting useful knowledge.
Alongside stood the practical remedies: wound care, herbs, poultices. What finds and sources from the North tell us about them is gathered in Herbs & healing of the Vikings and Viking medicine: between herbs and magic. Anyone with a festering wound probably got both: a poultice and a spell.
The Edda knows this link too. In the Rúnatal section of Hávamál, Odin lists his spells, and one of them is for those who want to live as healers (see our article on the Rúnatal). And Egil's saga tells a cautionary tale of a sick girl whom badly carved runes on a piece of whalebone had made even worse – until Egil scraped them off and carved new ones.
Anyone interested in Germanic healing spells sooner or later arrives at the Merseburg Charms. The two spells, preserved in a tenth-century manuscript at Merseburg, are written in Old High German, not in runes. The second is a cure for a sprained horse's leg: Phol and Wodan ride into the woods, Balder's foal sprains its foot, several goddesses chant over it, and finally Wodan heals it with the formula "bone to bone, blood to blood, limb to limb".
Merseburg tells a small story from the world of the gods and transfers it to the case at hand – scholars call this a "historiola". Canterbury tells no story; it commands, exposes and threatens. Wodan heals, Thor banishes: two methods, one worldview, both preserved in Christian books.
That leaves the question of why the charm was written in runes. Did runes have magical power in themselves? The sober answer: runes were first of all a script for recording names, ownership, memorials and messages. Plenty of objects carry entirely everyday texts. But there is also a group of inscriptions in which runes were clearly used for protection and healing – with formula words such as alu, with gods, with banishing spells. Our article Rune magic – alu, laukaz and the runic formula words gives an overview.
In Canterbury's case the runic script probably has a simple explanation: the spell came from Scandinavia, and there such texts were written in runes – on metal, bone and wood. The scribe in Canterbury carried the script over with the words. Whether the unfamiliar letters were also meant to make the spell more mysterious is speculation. The runes belong to the sixteen-character Younger Futhark used in the Viking Age.
By 1073 England had been Christian for over four centuries, and Denmark officially converted for more than a hundred years. And yet Thor's name stands in a book belonging to England's most important church. That does not mean heathens lived in Canterbury. It means that the shift from old faith to new took far longer and ran far more softly than conversion narratives suggest. How that transition unfolded overall is the subject of our article on the Christianisation of the Germanic peoples.
For the people who used such a spell this was probably no contradiction at all: God for the salvation of the soul, the saints for intercession – and against the fiend in the wound, the one who had always dealt with fiends. Someone with a wound that will not heal does not ask about doctrine; they ask for help.
For us in the workshop the charm has another side. It shows how closely writing and protection were bound together in our ancestors' thinking: what is written stays, and what stays has effect. When we engrave runes in slate, we do it as sign and remembrance, not as magic – but the feeling that a word fixed in lasting material is more than a spoken one is something we share with the scribe of Canterbury.
What is the Canterbury rune charm? An Old Norse healing spell in runes, added around 1073 to an English manuscript from Christ Church, Canterbury (British Library, Cotton Caligula A XV). It banishes a disease being and calls on Thor against a festering infection.
What does "þursa dróttinn" mean? Literally "lord of the thurses", i.e. of the giants or fiends. Comparison with the Sigtuna amulet makes it very likely that it refers to the disease demon, not to Thor.
What language is the Canterbury charm written in? Old Norse, in Younger Futhark runes, but written with pen and ink in an English manuscript. Linguistic features suggest the formula came from the East Norse, that is Danish or Swedish, area.
What illness was the charm meant to cure? The final line names "vein-pus" (æðravari) – probably a festering wound with spreading infection, perhaps blood poisoning in modern terms. An exact medical diagnosis is not possible.
Are there similar runic spells? Yes. The eleventh-century Sigtuna amulet uses almost the same wording, the Kvinneby amulet from Öland calls on Thor and his hammer, and Ribe has produced a skull fragment from around 725 and a healing stick from around 1300.
For courage. For remembrance. For legends that live on.
The Merseburg Charms · Runes · Thor & Mjöllnir · Seiðr & Magic.
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