 On Warham's death in August 1532 he resigned, and was succeeded by William Tresham, the nominee of John Longland, bishop of Lincoln, the newly elected Chancellor.As commissary, Cottisford was engaged in the attempt to stop the introduction of heretical Protestant books into Oxford, and in the arrest of Thomas Garret, parson of Honey Lane, London, who was active in the distribution of such literature, and was subsequently burnt at Smithfield in company with Robert Barnes and William Jerome.An account of the whole affair, and the dismay of Cottisford on hearing of Garret's escape from prison, is in John Foxe's "Acts and Monuments".