his "1st Protestant sermon". On 10 June 1549, the Prayer Book Rebellion broke out in Devon and Cornwall. There, Coverdale was directly involved in preaching and pacification attempts. Recognising the continuing unpopularity of the Book of Common Prayer in such areas, the Act of Uniformity had been introduced, making the Latin liturgical rites unlawful from Whitsunday 1549 onward. The west-country rebels complained that the new English liturgy was "but lyke a Christmas game" – men and women should form separate files to receive communion, reminding them of country dancing. The direct spark of rebellion occurred at Sampford Courtenay where, in attempting to enforce the orders, an altercation led to a death, with a proponent of the changes being run through with a pitchfork. Unrest was said also to have been fuelled by several years of increasing social dissatisfaction. Lord John Russell, 1st Earl of Bedford was sent by the Lord Protector to put down the rapidly spreading rebellion and Coverdale accompanied him as chaplain. The Battle of Sampford Courtenay effectively ended the rebellion by the end of August. However Coverdale remained in Devon for several more months, helping to pacify the people and doing the work that properly belonged to the Bishop of Exeter. The incumbent, John Vesey, was eighty-six, and had not stirred from Sutton Coldfield in Warwickshire, his birthplace and long-term residence. Bishop of Exeter, 1551 Coverdale spent Easter 1551 in Oxford with the Florentine-born Augustinian reformer Peter Martyr Vermigli. At that time, Martyr was Regius Professor of divinity, belonging to Magdalen College. He had been assisting Cranmer with a revision of the Anglican prayer book. Coverdale attended Martyr's lectures on the Epistle to the Romans and Martyr called him a "a good man who in former years acted as parish minister in Germany" who now "labours greatly in Devon in preaching and explaining the Scriptures". He predicted that Coverdale would become Bishop of Exeter and this took place on 14 August 1551 when John Vesey was ejected from his see. Third exile, 1553–1559 Edward VI died of tuberculosis on 6 July 1553. Shortly before, he had attempted to deter a Roman Catholic revival by switching the succession from Mary daughter of Henry VIII and Catherine of Aragon to Lady Jane Grey. However his settlement of the succession lasted barely a fortnight. After a brief struggle between the opposing factions, Mary was proclaimed Queen of England on 19