According to Ken Ozanne, Burke's Landed Gentry (1847) states that Richard lived temp. Edward II and had a summons dated 15 Feb 1322. I think Burke's could be wrong, and maybe the summons was to a Richard Fowell who was this Richard's father.
Father: Richard FOWELL , Sir b: ABT 1295 in Fowelscombe Manor, Ugborough, Devon, England
Marriage 1 Mary (Maria) WALROND b: ABT 1338 in Bradfield, Tiverton, Devon, England