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 Jan Allertz (Recorder of Rotterdam), all state that Richard killed the princes before he seized the throne (thus before June 1483). De Commines' "Memoirs" (c.1500), however, identifies the Duke of Buckingham as the person "who put them to death". Only Mancini's account is truly contemporary, having been written in London before November 1483. The Croyland Chronicle and de Commines' account were written three and seventeen years later, respectively (and thus after Richard III's death and the accession of Henry VII). Markham, writing long before Mancini's account was discovered, argued that some accounts, including the Croyland Chronicle, might have been authored