 Even William Langland, the author of the hugely influential "Piers Plowman", has been identified largely through conjecture.The longest poem of the Revival (over 14,000 lines), "The Destruction of Troy", is ascribed to a John Clerk from Lancashire, but little else is known about him.A notable exception to this lack of information is Scottish court poet William Dunbar; Dunbar generally wrote in syllabic metres, but displays a masterful use of the alliterative line in one poem at the very end of the period.