4th Century · St Gallen · 1802 · Kerry · 1849
Most scripts that fall out of daily use are eventually lost. Ogham is an exception. This is the story of how a writing system carved on Kerry stones in the 4th century was still alive in Kerry hands in 1849 — and what that survival tells us about the people who kept it.
The question
The conventional answer is: it doesn't. The history of writing is also a history of extinction. Cuneiform was used for three thousand years and then forgotten so completely that the tablets lay in the ground unread until the 19th century. Linear A has never been deciphered. The Rongorongo script of Easter Island — fewer than thirty surviving texts, no key, no known descendant — remains one of the great unsolved puzzles of human communication.
Ogham should, by most measures, have gone the same way. It was a script devised for a specific purpose — territorial and memorial inscription — at a specific historical moment. Once Irish society acquired the Latin alphabet through the spread of Christianity in the 5th and 6th centuries, Ogham had no obvious practical advantage. It was harder to carve, suited only to stone, and represented a system of sounds that the Latin script could handle adequately. The conditions for its disappearance were in place by 600 AD.
It did not disappear. Understanding why requires paying attention not to one kind of survival but to several — each distinct, each telling a different story about what Ogham meant to the people who preserved it.
The script that began on Kerry stones in the 4th century was still alive in Kerry in 1849. The distance between those two facts is fifteen centuries, and the chain connecting them was never broken.
The central argument of this essayScholars distinguish between two broad traditions of Ogham inscription. The first — orthodox or monumental Ogham — is what most people mean when they picture an Ogham stone: an edge-cut inscription on a standing stone, typically recording a name in the formula X MAQI Y, "of X, son of Y." These are the stones of the 4th to 7th centuries, carved in Primitive Irish, concentrated in Kerry, Cork, and Waterford, and representing the primary monumental phase of the script.
The second tradition is scholastic — Ogham used in manuscripts, on portable objects, in texts and marginalia, in cipher traditions, in medical practice. This is the Ogham that survived after the standing stones fell silent. It is more varied, more surprising, and considerably less well known. It is also the key to understanding why the script was still usable in 1849.
The two traditions overlap in time but differ fundamentally in purpose. The stone tradition says: this person existed, here, in this land, of this lineage. The scholastic tradition says: this knowledge is worth preserving, and Ogham is the tool for preserving it. Between them, they carried a script across fifteen centuries.
Through the centuries
At no point was the chain broken. What changed was the medium — not the knowledge.
Ogham is carved on standing stones across Munster and beyond — Kerry, Cork, Waterford, into Wales and Scotland with Irish settlement. The inscriptions are territorial and memorial: short, formulaic, and built to last. This is Ogham at its most public and most permanent. Over 400 of these stones survive.
As the Latin alphabet takes hold in Irish monastic culture, Ogham begins its transition from stone to vellum. Monks copy and categorise the inscriptions, recording them as objects of scholarly interest. The Auraicept na n-Éces (Scholars' Primer), composed in the 7th century and preserved in the Book of Ballymote (c.1391), is the first great systematic treatment of the alphabet — documenting its letter names, its variant forms, its mythological origins. Ogham is no longer being used to mark land; it is being studied as a cultural inheritance.
An Irish scribe working at the Abbey of St Gallen in Switzerland — probably a monk trained at Bangor or Nendrum — is glossing a copy of Priscian's Latin grammar. In the margin, alongside scholarly Latin notes, he jots a single word in Ogham. The word is LATHEIRT: "hangover." The manuscript, now MS 904 in the Abbey Library at St Gallen and the National Library of Scotland, preserves the oldest surviving example of Ogham in a manuscript. The scribe was not recording an inscription or copying a text. He was, apparently, making a private note — in a script that was his own, not the Latin surrounding it.
The Ballyspellan Brooch, found in Co. Kilkenny and now in the National Museum of Ireland, carries four lines of Ogham on its back recording successive owners: Cnáimsech, Cellach; Mín odor the noble; Máel Maire; Máel Úadaig son of Máel Maire (White, 2021). It is an object with a documented history written into its surface — a named succession over perhaps two centuries. Ogham here is functioning as a property register, not a monument.
The In Lebor Ogaim (Book of Ogham) documents over one hundred variant alphabets — Ogham encoded by bird names (Enogam), colours (Dathogam), tree names (Crannogam), geometric forms, snake-paths, reversed and mirrored scripts. These are not decorative curiosities; they represent a living intellectual tradition of cryptographic writing used by the professional learned class (Carney, 1975). Separately, the Mac an Leagha family of hereditary physicians, operating in the early 16th century, used Ogham in their medical manuscripts — a practical choice, not a ceremonial one. The OG(H)AM Project has documented this use directly.
A gravestone is carved in Ahenny, Co. Tipperary, with an inscription in both English and Ogham: "Under this stone lies Mary Dempsy from Ballycranna" (Raftery, 1969). This is the latest known use of Ogham on a standing stone. The tradition of carving names in stone that began in 4th-century Kerry ends here, fourteen centuries later, with a woman's name in a Tipperary churchyard. Mary Dempsy almost certainly did not know she was the last.
A 66-page notebook of healing charms is written entirely in Ogham script. The manuscript — NLS Adv. MS 50.3.11, held in the National Library of Scotland — is thought to have been composed in Kerry around 1849 (OG(H)AM Project, 2023; Forsyth and Kasten, 2023). It is the year of the Famine. Someone in Kerry, in the worst year in Irish modern history, sat down and wrote sixty-six pages of healing knowledge in a script that had been carved on the standing stones of their county fifteen centuries earlier. The knowledge had not died. It had been carried forward, in manuscript tradition, in medical practice, in the cipher traditions of the learned class, until it was still usable in a Kerry hand in the mid-19th century.
The key documents
The Abbey Library of St Gallen holds one of the great treasures of early medieval Irish scholarship — a 9th-century copy of Priscian's Institutiones Grammaticae, extensively glossed by Irish monks. MS 904 is covered in marginal notes in Irish, in Latin, in a mixture of both. It documents a community of Irish scholars working in exile on the continent, maintaining their intellectual tradition far from home.
Among those notes is LATHEIRT. The word is of interest on several levels. As a piece of Ogham, it demonstrates that the script was available to an Irish scholar working in Switzerland in the middle of the 9th century — not as a ceremonial or archaeological curiosity, but as a natural tool for a private thought. As a word, it is a compound: laith (ale, liquid) + irt (heavy, oppressive). It is also, unmistakably, the note of someone with a sense of humour.
The oldest Ogham in a manuscript is a private note about a hangover, written by an Irish monk in Switzerland in 845 AD. The script had not been forgotten. It had been taken abroad.
St Gall Priscian Glosses, NLS / Abbey Library St Gallen MS 904NLS Adv. MS 50.3.11 presents a different kind of evidence. Where LATHEIRT is a single casual note, the Minchin Manuscript is a deliberate, substantial document — 66 pages of healing charms, written entirely in Ogham, composed in Kerry around 1849 (Forsyth and Kasten, 2023).
The significance cannot be overstated. The standard assumption, before this manuscript was properly assessed, was that practical knowledge of Ogham had effectively died out in the early modern period — that while scholars could read the inscriptions with effort, and while Ogham appeared in manuscripts as a historical subject, nobody was actually using the script to write new texts by the 19th century. The Minchin Manuscript overturns this. Someone in Kerry in 1849 chose Ogham as the script in which to record medical knowledge — not because it was the only option, not because Latin or Irish script was unavailable, but because it was the appropriate medium for this kind of knowledge.
This connects directly to the cipher and medical manuscript tradition that had been running since the early medieval period. The Mac an Leagha family physicians of the 16th century used Ogham in their practice. The learned class tradition of writing specialist knowledge in Ogham — keeping it accessible to those trained in the script and opaque to others — had evidently persisted into the 19th century, in Kerry, where the script had first been carved on stone fifteen hundred years earlier.
Reference: NLS Adv. MS 50.3.11. National Library of Scotland, Edinburgh.
Date: c. 1849. Thought to have been composed in Kerry.
Content: 66 pages of healing charms written entirely in Ogham script.
Sources: OG(H)AM Project (2023); Forsyth, K. and Kasten, M. (2023). "OG(H)AM." Runes et al., Vol. 1.
What it means
The standard narrative of Ogham — in popular culture and in many introductory accounts — treats the script as essentially dead by the early medieval period: a relic of pagan Ireland, preserved in stone, catalogued by scholars, and superseded by the Latin alphabet. The evidence does not support this narrative.
Ogham survived not despite the arrival of Christianity and Latin literacy, but alongside it and through it. The monks who copied and classified Ogham inscriptions in the medieval period were not curators of a dead tradition — they were transmitting a living one. The scholars who developed the cipher traditions in In Lebor Ogaim were not engaged in antiquarianism — they were using Ogham as an active intellectual tool. The physicians who wrote medical texts in Ogham in the 16th century were making a practical choice. And the Kerry writer of 1849 was continuing, almost certainly without thinking of it in these terms, a chain of knowledge transmission that reached back to the 4th century.
The chain was never broken. What changed was its visibility. Monumental Ogham is public; it stands in fields and can be seen by anyone passing. Manuscript Ogham is private; it lives in libraries and archives, in the collections of 19th-century Edinburgh and 9th-century Switzerland. The script moved from the field to the scriptorium, from the scriptorium to the medical text, from the medical text to the notebook — and at each stage it continued to carry something worth carrying.
The Minchin Manuscript is the end of that particular chain. No later use of Ogham for new writing has been identified. But 1849 is, by any measure, a remarkable endpoint. Fifteen centuries from the first Kerry stones. The year of the Famine. And someone in Kerry was still writing.
The script did not survive because people remembered it. It survived because people used it.
On the nature of Ogham's transmission