Cranmer's role in politics was diminishing when on 16 October 1551 Seymour was arrested on charges of treason. In December Seymour was put on trial and although acquitted of treason, he was judged guilty of felony and put to death on 22 January 1552. This was the beginning of the breach between Cranmer and Dudley. It was aggravated during the year by the gradual appropriation of ecclesiastical property by the regency. Even throughout this political turmoil, Cranmer worked simultaneously on three major projects in his reform programme: the revision of canon law, the revision of the Prayer Book, and the formation of a statement of doctrine.