The story of the adventures of the Irish abbot St. Brendan or Brenainn was a popular one in the middle ages, with a substantial number of manuscripts surviving. The most familiar version, the Navigatio Sancti Brendani Abbatis, was written in Latin and may date to the eighth century, that is, roughly two centuries after Brendan is thought to have died. A translation is found in the Penguin Classics volume entitled The Age of Bede (where it's arguably an odd fit); another, by John J. O'Meara, is available from Colin Smythe Ltd under the title of The Voyage of Saint Brendan, Journey to the Promised Land.
Brendan's travels, like those of Odysseus, involve visits to several wondrous islands, including in his case one that is inhabited entirely by psalm-singing birds and another that turns out to be an enormous sea-creature named Jasconius (from Old Irish íasc, fish). He and his fellow monks come upon what seems to be an iceberg as well as something that sounds very much like a volcano, and these and other passages have led some observers to surmise that Brendan or other early Irish travelers may have visited the North Atlantic and even North America. The notion isn't entirely far-fetched, as Irish monks — the papar — traveled as far as Iceland at a very early date. On the other hand, Brendan's adventures seem to have mythological parallels in pre-Christian Ireland and elsewhere.
But there's another Brendan tradition, one that is preserved in the Irish language in a manuscript known as the Book of Lismore. This version, the Betha Brenainn, seems to be harder to find outside of scholarly works like Whitley Stokes's Lives of Saints from the Book of Lismore and Denis O'Donoghue's Brendaniana: St. Brendan the Voyager in Story and Legend, both of which date to the 1890s. The Irish-language version may be less satisfying to the modern reader than the Latin one, but it has its own charm (at least in translation). Here, for example, is Stokes's rendering of a dazzling passage — not unworthy of Homer — that describes the outset of Brendan's voyage:
So Brenainn, son of Finnlug, sailed then over the wave-voice of the strong-maned sea, and over the storm of the green-sided waves, and over the mouths of the marvellous, awful, bitter ocean, where they saw the multitude of the furious red-mouthed monsters, with abundance of great sea-whales. And they found beautiful, marvellous islands, and yet they tarried not therein.The writer's sheer delight in language receives its richest expression in a lengthy enumeration of the sights of Hell, which are shown to Brendan in consideration of his special sanctity. Stokes again:
It goes on from there, itemizing "cats scratching; hounds rending; dogs hunting; demons yelling; stinking lakes..." and, finally, "tortures vast, various." No torment is left uncatalogued, no linguistic resource left unused. If no one has thought of doing so, it would be fun to see an edition bringing together translations of the Latin Navigatio and the Irish version in one accessible volume.
Below is the first installment of a three-part reading of the O'Meara translation of the Navagatio by the Dean of Canterbury, the Very Reverend Dr. Robert Willis.