Mr. Cornwell, I have been an avid fan of your novels for a long time. I absolutely love the Saxon Stories. In fact, I am such a fan of the history of the Viking age, I am now writing a technical paper for one of my classes. The subject of this paper is going to be the naval architecture of Viking longboats. I was wondering, as the author of such a great many well researched novels, if you had any specific sources that I should consult. Thanks for your time, Aidan McAllister