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 current historians, including David Starkey, Michael Hicks, Helen Castor and A. J. Pollard regard Richard himself as the most likely culprit. There was no formal accusation against Richard III on the matter; the Bill of Attainder brought by Henry VII made no definitive mention of the Princes in the Tower, but it did accuse Richard of "the unnatural, mischievous and great perjuries, treasons, homicides and murders, in shedding of infant's blood, with many other wrongs, odious offences and abominations against God and man". The "shedding of infant's blood" may be an accusation of the Princes' murder. Hicks speculated that it