A formal letter patent from Queen Elizabeth I granting royal assent to the Earl of Derby's presentation of John Mericke (Master of Arts) as Bishop of the Isle of Man. The document affirms the Earl of Derby's hereditary right of patronage and nomination to the bishopric, and commands the Archbishop of Canterbury to confirm, consecrate, and invest Mericke. This source illustrates the Crown's ecclesiastical supremacy over the Isle of Man and the Earl of Derby's feudal rights over the island during the Tudor period.