[4] John died on 18 October 1216 and was succeeded by his nine-year-old son Henry who, not being despised by the barons, attempted to calm things down.

On 15 May 1218 Henry confirmed William's lordship of the manor of Torrington, Lincolnshire, and 10 librates (£10 worth of land) in Berwick, Sussex, which his father had previously given him by charter.

[9] His seal attached to the deed consists of an angel, erect and holding a censer, with the words "William Marmion, cleric" written underneath.

The barons were led by Simon de Montfort and after he had defeated Henry III at the Battle of Lewes on 14 May 1264, he held a Parliament at Westminster Palace.

Large numbers of clergy and burgesses were invited to attend for the first time in the hope that de Montford would recruit more support for his rebellion, as most of the barons had already chosen sides or been killed in the war.