David McCullough (2011). “David McCullough American History E-book Box Set: John Adams, 1776, Truman, The Course of Human Events”, p.642, Simon and Schuster
"Mylo: Would you ever play Glastonbury? Elton: Oh no - I'm too like the Queen Mother". Interview with Myles 'Mylo' MacInnes, www.theguardian.com. February 3, 2005.
Thomas Jefferson (2012). “The Papers of Thomas Jefferson, Retirement Series, Volume 8: 1 October 1814 to 31 August 1815: 1 October 1814 to 31 August 1815”, p.212, Princeton University Press
Thomas Jefferson (1853). “The writings of Thomas Jefferson: being his autobiography, correspondence, reports, messages, addresses, and other writings, official and private”, p.389