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The master of Nightmare Abbey; a gentleman of an atrabilarious temperament, a widower and the father of Scythrop Glowry.
In slang the meaning then as now was "angry, irascible, aggressive, atrabilarious, angry, fulminant, furious, fractious, anxious, irritable, stormy, touchy", which produced such ancient surnames as Peiverel, Pevrel and Peivrel.