"I now related my history briefly, but with firmness and precision, marking the dates with accuracy, and never deviating into invective or exclamation"

   If we assume that Frankenstein's narration to the magistrate is anything like his narration to Walton has been, this passage can only be taken as an ironic comment on the novel itself.  At this point in the story its numerous chronological inaccuracies (See note to page 54), and Victor's frequent flights into hysterical hyperbole, are becoming increasingly hard to miss.