Elizabeth I of England Plot of 1586, Elizabeth's spymaster Sir Francis Walsingham and the royal council keenly assembled a case against her. At first, Elizabeth resisted calls for Mary's death. By late 1586, she had been persuaded to sanction her trial and execution on the evidence of letters written during the Babington Plot. Elizabeth's proclamation of the sentence announced that "the said Mary, pretending title to the same Crown, had compassed and imagined within the same realm divers things tending to the hurt, death and destruction of our royal person." On 8 February 1587, Mary was beheaded at Fotheringhay Castle, Northamptonshire. After Mary's execution,
Fotheringhay Castle was named "protector and defender of the realm" while King Henry VI was suffering from mental illness and remained in the position until 9 February 1455. During the subsequent Wars of the Roses between the houses of York and Lancaster the Duke of York was killed at the Battle of Wakefield in 1460. Fotheringhay Castle remained a favoured residence of the family after Richard's death: Cecily often entertained guests there and in 1469 Elizabeth Woodville, Edward IV's queen, resided at the castle. On 11 June 1482, the Scottish prince, Alexander Stewart, Duke of Albany made a treaty at the castle