The Fenian Cycle

Key takeaways: the Fenian Cycle is the wilderness literature of Fionn mac Cumhaill and the Fianna; it spans a thousand years of composition, from eighth-century poems through the Acallam na Senórach (c. 1200) to the seventeenth-century Duanaire Finn and beyond; its themes are the hunt, forbidden love and the passing of a heroic age; and it is the cycle that flowed most freely into modern oral tradition.

What is the Fenian Cycle?

The Fenian Cycle, also called the Fiannaíocht or Ossianic cycle, is the literature of Fionn mac Cumhaill and the fianna, the landless warrior bands who live by hunting and fighting on the margins of settled Ireland. Where the Ulster Cycle belongs to courts and cattle lords, the Fenian tales belong to the wild: the deer-runs of Sligo and Kerry, the lake-edges, the hostile feast-halls that appear at nightfall and vanish by morning. It is also the most loved and longest-lived of the cycles. Medieval monks wrote Fionn; eighteenth-century poets were still composing him; and the storytellers recorded by the folklore collectors of the twentieth century had never stopped telling him.

When were the tales written down, and in what manuscripts?

The cycle’s written span is enormous. Material naming Fionn survives from roughly the eighth century, contemporary with the early Ulster tales. The Macgnímartha Finn, the Boyhood Deeds of Fionn, preserves the salmon story in a medieval text that survives in later copies. The cycle’s crowning work, Acallam na Senórach, was composed around 1200 and survives in fifteenth-century manuscripts including the Book of Lismore and Laud Misc. 610 [manuscript list to be confirmed]. The lays kept coming: Duanaire Finn, the Poem-Book of Fionn, was copied for the exiled patron Somhairle Mac Domhnaill at Ostend and Louvain in 1626 and 1627, and Mícheál Coimín composed the famous lay of Oisín in Tír na nÓg as late as the eighteenth century. No other cycle was still growing so vigorously so late.

Who are the cycle’s major figures?

Fionn himself is hero, hunter, seer and poet, the hidden child who burns his thumb on the Salmon of Knowledge and carries wisdom at a tooth’s touch ever after. Around him gather Oisín his son, the poet who outlives them all; Oscar his grandson, the Fianna’s greatest warrior, killed at Gabhra; Caílte of the swift feet, the Acallam’s tireless rememberer; Diarmuid Ua Duibhne of the love-spot, doomed by loyalty and a boar; and Gráinne, the king’s daughter who binds Diarmuid with a geis and chooses her own fate. Goll mac Morna, Fionn’s rival and sometime ally, supplies the cycle’s long internal feud.

What are the cycle’s great themes?

The hunt and the wild place come first: the cycle is saturated in landscape, and the Acallam is practically a mythological gazetteer of Ireland, story after story hung on hills, wells and cairns. Then forbidden love and the geis, the binding obligation that drives Diarmuid and Gráinne out into a fugitive life among the dolmens still called their beds. Above all, the passing of an age: the late tales are elegies, with Oisín returned from Tír na nÓg or Caílte walking with Patrick, old pagans remembering a brighter world to a new dispensation that writes it down even as it supersedes it.

Where should you start?

• An Bradán Feasa, the Salmon of Knowledge: how the boy Fionn got his wisdom at Fec’s Pool on the Boyne.
• Tóraigheacht Dhiarmada agus Ghráinne, the pursuit of Diarmuid and Gráinne, the cycle’s great doomed love story, ending under Ben Bulben.
• Oisín i dTír na nÓg, three hundred years in the Land of the Young and the fatal homecoming.
• Fionn mac Cumhaill, the full arc of the hero, from hidden child to contested death.
• Tír na nÓg, the western Otherworld itself: where it lies, and what it costs to leave.

How does the Fenian Cycle connect to the other cycles?

The Tuatha Dé Danann of the Mythological Cycle keep crossing into Fenian ground: Aillén the burner of Tara is one of them, Diarmuid’s foster-father Aengus Óg shelters the lovers, and the síd-mounds open repeatedly under the Fianna’s feet. The Acallam’s frame, warriors of the old world talking with St Patrick, ties the cycle to the hagiographical and kings’ material around Tara and Cashel. And no cycle passed more completely into folklore: the Fionn of the later oral tradition is a giant who builds causeways and outwits rivals, proof that the Fianna never needed manuscripts to survive.