^Sanders, I.J. English Baronies, a Study of their Origin and Descent 1086–1327, Oxford, 1960, pp. 116-117
^Vivian, p. 133 Vivian, Lt. Col. J.L., (Ed.) The Visitations of the County of Devon: Comprising the Heralds' Visitations of 1531, 1564 & 1620, Exeter, 1895, p. 133, pedigree of Carew