Martin Marprelate was the name used by the anonymous author or authors of the Marprelate tracts. These circulated illegally in the years 1588 and 1589. Their principal focus was an attack on the episcopacy of the Anglican Church. In 1583, the appointment of John Whitgift as Archbishop of Canterbury had signalled the beginning of a drive against the Presbyterian movement in the church, and an era of censorship began. In 1586, by an edict of the Star Chamber, the archbishop was empowered to license and control all of the printing apparatus in the country.