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An only 'current father' of a Fielding family, Thomas Fielding (sometimes called him Tomis) is a grandson of Eckhart and a granddaughter of Mavis, who is mostly responsible to keep an eye out on not only his own family but also other fellow mices of Crumbfest Cove while ensuring the safety and harmony when he usually antagonizes Chauncey 'Boss' Mouse (a mayor of Crumbfest Cove and Eckhart's everyday nemesis) that sometimes the greediness side maybe took over. He appears in children's book The True Meaning of Crumbfest released somewhere in January 1996, along with its special 'pilot' adaptation based on this book and the titular mouse character, in November 1998 and September 2000 respectively.