 He was also questioned on a letter to him from Diana in October 1993, in which she said her husband was planning to have her killed to make the path clear for him to marry Camilla Parker-Bowles.The coroner dismissed notions of a "secret" that Burrell knew about Diana that he swore he "would never reveal," as detailed at the end of his book, "A Royal Duty".Other matters were discussed in relation to the case, many alleged and not proven, including allegations of perjury at the coroner's court, and allegations about his personal life.