Devereux died on 25 February 1601 at age 34 at Tower of London, The City, London, England, beheaded for treason.
Robert Devereux, 3rd Earl of Essex b. 22 Jan 1591, d. 14 Sep 1646
Lady Frances Devereux b. 20 Sep 1599, d. 23 Nov 1679
↑ G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume II, page 250. Hereinafter cited as The Complete Peerage.
↑ Cokayne, and others, The Complete Peerage, volume III, page 231.