Navigatio Sancti Brendani
Navigatio Sancti Brendani Abbatis is a story describing a legendary voyage of Brendan of Clonfert (c. AD 484 – c. 577). Many versions were circulating in Europe from the 10th century. The story is plainly a Christian narrative, but also narrates natural phenomena and fantastical events and places, which appealed to a broad audience. It narrates the voyage of Brendan to find the Promised Land of the Saints.
Here, in a clean pdf, a Latin version of the story is presented. A corrospended English version to this Latin version (not 100% match, but close enough), is to be found here on p.111 (p.154 of the pdf)