Edward died suddenly in April 1484. The
Croyland Chronicle states it occurred "on a day not very far distant from the anniversary" of his uncle
Edward IV's death (9 April 1483), leading to the common attribution of 9 April 1484. However, historian John Rous indicated death at "Easter-time" (Easter Sunday was 18 April 1484), suggesting a possible later date around mid-April. The cause is unknown, with speculation including tuberculosis or another short illness. The
Croyland Chronicle reads: Edward's sudden death left Richard without a legitimate child. Contemporary historian
John Rous recorded that Richard declared his nephew
Edward, Earl of Warwick, his heir-presumptive, but there is no other evidence of this, and it seems unlikely as Richard's own claim was based on the attainting of Warwick's father. Similarly,
John de la Pole, 1st Earl of Lincoln also seemed to have been designated as Richard's heir-presumptive, but was never publicly proclaimed as such. Richard's enemies were inclined to believe that Edward's sudden death was
divine retribution for Richard's alleged involvement in the usurpation and subsequent disappearance of the sons of Edward IV, his nephews
Edward V of England and
Richard, Duke of York. It may have also emboldened them to renew hostilities. ==Burial==