<P> On 13 June Gloucester accused Hastings of plotting with the Woodvilles and had him beheaded . Nine days later Gloucester convinced Parliament to declare the marriage between Edward IV and Elizabeth illegal, rendering their children illegitimate and disqualifying them from the throne . With his brother's children out of the way, he was next in the line of succession and was proclaimed King Richard III on 26 June . The timing and extrajudicial nature of the deeds done to obtain the throne for Richard won him no popularity, and rumours that spoke ill of the new king spread throughout England . After they were declared bastards, the two princes were confined in the Tower of London and never seen in public again . </P> <P> Discontent with Richard's actions manifested itself in the summer after he took control of the country, as a conspiracy emerged to displace him from the throne . The rebels were mostly loyalists to Edward IV, who saw Richard as a usurper . Their plans were coordinated by a Lancastrian, Henry's mother Lady Margaret, who was promoting her son as a candidate for the throne . The highest - ranking conspirator was Buckingham . No chronicles tell of the duke's motive in joining the plot, although historian Charles Ross proposes that Buckingham was trying to distance himself from a king who was becoming increasingly unpopular with the people . Michael Jones and Malcolm Underwood suggest that Margaret deceived Buckingham into thinking the rebels supported him to be king . </P> <P> The plan was to stage uprisings within a short time in southern and western England, overwhelming Richard's forces . Buckingham would support the rebels by invading from Wales, while Henry came in by sea . Bad timing and weather wrecked the plot . An uprising in Kent started 10 days prematurely, alerting Richard to muster the royal army and take steps to put down the insurrections . Richard's spies informed him of Buckingham's activities, and the king's men captured and destroyed the bridges across the River Severn . When Buckingham and his army reached the river, they found it swollen and impossible to cross because of a violent storm that broke on 15 October . Buckingham was trapped and had no safe place to retreat; his Welsh enemies seized his home castle after he had set forth with his army . The duke abandoned his plans and fled to Wem, where he was betrayed by his servant and arrested by Richard's men . On 2 November 1483 he was executed . Henry had attempted a landing on 10 October (or 19 October), but his fleet was scattered by a storm . He reached the coast of England (at either Plymouth or Poole) and a group of soldiers hailed him to come ashore . They were, in fact, Richard's men, prepared to capture Henry once he set foot on English soil . Henry was not deceived and returned to Brittany, abandoning the invasion . Without Buckingham or Henry, the rebellion was easily crushed by Richard . </P> <P> The survivors of the failed uprisings fled to Brittany, where they openly supported Henry's claim to the throne . At Christmas, Henry Tudor swore an oath to marry Edward IV's daughter, Elizabeth of York, to unite the warring houses of York and Lancaster . Henry's rising prominence made him a great threat to Richard, and the Yorkist king made several overtures to the Duke of Brittany to surrender the young Lancastrian . Francis refused, holding out for the possibility of better terms from Richard . In mid-1484 Francis was incapacitated by illness and while recuperating, his treasurer Pierre Landais took over the reins of government . Landais reached an agreement with Richard to send back Henry and his uncle in exchange for military and financial aid . John Morton, a bishop of Flanders, learned of the scheme and warned the Tudors, who fled to France . The French court allowed them to stay; the Tudors were useful pawns to ensure that Richard's England did not interfere with French plans to annex Brittany . On 16 March 1485 Richard's queen, Anne Neville, died, and rumours spread across the country that she was murdered to pave the way for Richard to marry his niece, Elizabeth . The gossip alienated Richard from some of his northern supporters, and upset Henry across the English Channel . The loss of Elizabeth's hand in marriage could unravel the alliance between Henry's supporters who were Lancastrians and those who were loyalists to Edward IV . Anxious to secure his bride, Henry recruited mercenaries formerly in French service to supplement his following of exiles and set sail from France on 1 August . </P>

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