He thus began his tale
We enter here into a third level of narrative, one that is embedded within Victor Frankenstein's autobiography, which is itself being transcribed by Walton each night of its recounting for his sister's future perusal. Issues of the authority and even the reliability of any particular level of the narrative thus abound and have raised serious debate in the critical literature on the novel. As the Creature twice in these two paragraphs speaks of his "tale," so Victor refers to his narrative as a "tale" as well (see I:L4:30 and I:3:13). The underlying question is how true is any tale.