Many of the important hagiographical texts composed in medieval England were written in the vernacular dialect Anglo-Norman. With the introduction of Latin literature into England in the 7th and 8th centuries the genre of the life of the saint grew increasingly popular. When one contrasts it to the popular heroic poem, such as "Beowulf", one finds that they share certain common features. In "Beowulf", the titular character battles against Grendel and his mother, while the saint, such as Athanasius' Anthony (one of the original sources for the hagiographic motif) or the character of Guthlac, battles against figures no less substantial in a spiritual sense. Both genres then focus on the hero-warrior figure, but with the distinction that the saint is of a spiritual sort.