Princes in the Tower household which stated: "the children should be together at one breakfast". James Gairdner, however, argues that it is unclear to whom the phrase "the children" alludes, and that it may not have been a reference to the princes. It may refer to Edward, Earl of Warwick (son of the Duke of Clarence) and Edward IV's two youngest daughters (Catherine and Bridget), all of whom were living under Richard's care at Sheriff Hutton. Other than their disappearance, there is no direct evidence that the princes were murdered, and "no reliable, well-informed, independent or impartial sources" for the associated events. Nevertheless, following
Princes in the Tower without Richard's knowledge and overlook the fact that Richard was responsible for the safekeeping of his nephews". The Beaufort theory has more recently been supported by Philippa Gregory and is explored in her "Cousins' War" novels, as well as her BBC documentary series "The Real White Queen and her Rivals", but is not supported by any evidence other than a speculative one of possible motive. Historian David Baldwin suggests that Henry VII's reticence on the subject may have been due to the fact that at least one of the princes was still alive; he considers that the likelier candidate for