Dear Bernard, I’m a great fan of your books, and in particular the sheer level of background research that has gone into them (i think my favourites are the either the grail quest or saxon books). I’m also looking at writing a set of books myself, concerning the Percy-Neville feud and the war of the roses (I won’t say any more to save you from the lawyers) and was wondering whether, in the course of researching for other books you might have come across any particularly good sources concerning the subject? Thanks a lot for your help. Daniel.