In an introductory "Author's Note" to the novel, O'Brian sets out his approach to historical accuracy, noting that historic records of naval battles are filled with "actions that few men could invent". He goes on to say, "That is why I have gone straight to the source for the fighting in this book ... and so when I describe a fight I have log-books, official letters, contemporary accounts or the participants' own memoirs to vouch for every exchange ... Yet, on the other hand, I have not felt slavishly bound to precise chronological sequence; ... within a context of general historical accuracy I have changed names, places and minor events". He considers that "authenticity is a jewel", and that "the admirable men of these times ... are best celebrated in their own splendid actions rather than in imaginary contests".