William FitzWilliam (Lord Deputy) William FitzWilliam (Lord Deputy) Sir William FitzWilliam (1526–1599) was an English Lord Justice of Ireland and afterwards Lord Deputy of Ireland. In 1587, as Governor of Fotheringhay Castle, he supervised the execution of the death sentence on Mary, Queen of Scots. He was the Member of Parliament for Peterborough and represented County Carlow in the Irish House of Commons. He lived at Gainspark, Essex, and Milton Hall. FitzWilliam was born at Milton Hall, Northamptonshire, the eldest son of Sir William (d. 1576) and grandson of William Fitzwilliam, Sheriff of London, who had been treasurer and chamberlain to Cardinal Wolsey and
Mary Beaton Ogilvy of Boyne in April 1566, having one son, James, born in 1568. Little else is known of her life. After the execution of Queen Mary, it was claimed by the writer Adam Blackwood in 1587 that Mary Beaton's handwriting was similar to the Queen's and so some of her private letters might have formed the basis for the casket letters produced to incriminate Queen Mary. She died in 1598 at the age of 55. Beaton is portrayed by Eileen O’Higgins in the 2018 film Mary, Queen of Scots. Mary Beaton Mary Beaton (1543–1598) was a Scottish noblewoman and an