Afier an Introduction in which the author refers to the arrival of the Nordicmen to the American Continent on the Middle Ages, to the doubt of the Irishmen's previuous arrival and to the proof of the occupation of the Atlantic North
islancls by these before by those, it is adhered to the thesis started by Charles Plummer in the sense that it is necessazy to distinguish between the Vita Sancti Brendani and Nauigatio Sancti Brendani, considering that, though in a given
moment they joined themselves, at the beginning they were different texts.
