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
English invasion of Scotland (1482) the garrison for his safety. Richard, not having expected to meet this coup d'état, did not have resources to besiege the castle. As the details of the Fotheringhay treaty became known, vital Scottish support for Albany as king evaporated. Albany, his brother's party, and the keepers of the castle became reconciled. On 2 August Albany and Gloucester signed a bond with Colin, Earl of Argyll, Archbisbop Scheves, Lord Avandale, and the Bishop of Dunkeld which promised a pardon for Albany and the restoration of his previous dignities. The English army made a truce on 4 August 1482 and withdrew with