 He and Martyr were to hold a public disputation in 1549, but fled to Leuven before it could be held.On release he left to become professor of divinity at Louvain, returning on the accession of Mary to become canon of Christ Church and royal chaplain and take a major part in proceedings against Thomas Cranmer, Nicholas Ridley, and Hugh Latimer.Regaining most of his benefices, he lost them all again when Elizabeth succeeded Mary, and was briefly imprisoned in the house of Archbishop Matthew Parker.