Hunneyball, Paul, "Callington Borough", published in History of Parliament: House of Commons 1604–1629, ed. Andrew Thrush and John P. Ferris, 2010 [3]
ukga.org
Vivian, J.L., The Visitations of Cornwall: comprising the Heralds' Visitations of 1530, 1573 & 1620; with additions by J.L. Vivian, Exeter, 1887, pedigree of "Trefusis of Trefusis", pp.463-8, p.464 [1]Archived 4 March 2016 at the Wayback Machine
Vivian, J.L., The Visitations of Cornwall: comprising the Heralds' Visitations of 1530, 1573 & 1620; with additions by J.L. Vivian, Exeter, 1887, pedigree of "Trefusis of Trefusis", pp.463-8 [2]Archived 4 March 2016 at the Wayback Machine; The first of the family to whom a date is assigned by Vivian, 1887, p.463 is "William Trefuses" who was living in 1291 (regnal date 22 Edward I), who was descended in the fourth generation from "Aceus de Trefuses", who is likely therefore to have been living in the 12th century
web.archive.org
Vivian, J.L., The Visitations of Cornwall: comprising the Heralds' Visitations of 1530, 1573 & 1620; with additions by J.L. Vivian, Exeter, 1887, pedigree of "Trefusis of Trefusis", pp.463-8, p.464 [1]Archived 4 March 2016 at the Wayback Machine
Vivian, J.L., The Visitations of Cornwall: comprising the Heralds' Visitations of 1530, 1573 & 1620; with additions by J.L. Vivian, Exeter, 1887, pedigree of "Trefusis of Trefusis", pp.463-8 [2]Archived 4 March 2016 at the Wayback Machine; The first of the family to whom a date is assigned by Vivian, 1887, p.463 is "William Trefuses" who was living in 1291 (regnal date 22 Edward I), who was descended in the fourth generation from "Aceus de Trefuses", who is likely therefore to have been living in the 12th century
