Princes in the Tower "the murther of his nephews towards the world", indicating that the boys did indeed meet their end during Richard's days. It is also unlikely that the princes would have been kept alive in secret by Richard for 2 years after their last sighting while rumours of his responsibility for their murder circulated. Some writers have also accused John Howard, 1st Duke of Norfolk; Margaret Beaufort, Henry VII's mother; and Jane Shore (Edward IV's mistress). Pollard writes of these theories: "None deserve serious consideration. The problem with all these accusations is that they beg the question of access to the Tower
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