Princes in the Tower becoming king, Henry married the princes' eldest sister, Elizabeth of York, to reinforce his claim to the throne. Not wanting the legitimacy of his wife or her claim as heiress of Edward IV called into question, prior to the marriage he had repealed the "Titulus Regius" which had previously declared the princes (and Elizabeth) illegitimate. Markham suggests the princes were executed under Henry's orders between 16 June and 16 July 1486, claiming that it was only after this date that orders went out to circulate the story that Richard had killed the princes, and that the princes' mother, Elizabeth Woodville,
Princes in the Tower long as they were alive. The boys could have been used by Richard's enemies as figureheads for rebellion. Rumours of their death were in circulation by late 1483, but Richard never attempted to prove that they were alive by having them seen in public, which strongly suggests that they were dead by then. However, he did not remain silent on the matter. Raphael Holinshed, in his "Chronicles of England, Scotland and Ireland", written in 1577, reports that Richard, "what with purging and declaring his innocence concerning the murder of his nephews towards the world, and what with cost to obtain