1. Johan Huizinga, “A Definition of the Concept of History,” In Philosophy & History. Essays Presented To Ernst Cassirer, In Philosophy And History. Essays Presented To Ernst Cassirer (Eds. Raymond Klibansky And H.J. Paton Oxford: Clarendon Press, 1936) 
  2. George Santayana (1863–1952), U.S. Philosopher, Poet. Life Of Reason, “Reason In Common Sense,” Ch. 12 (1905-6) 
  3. The Peoples Journal Of London 1847 On Anaesthesia
  4. Essays On The First Hundred Years Of Anaesthesia By W. Stanley Sykes Published In 1960, Livingstone (Edinburgh) 
  5. Genesis 2:21 King James Version 
  6. College Of Operating Department Practitioners (CODP)
  7. http://www.bartsandthelondon.nhs.uk/about-us/our-history/history-of-modern-medicine-and-timelines/the-history-of-the-royal-london-hospital/ (Bell)
  8. The London Hospital E.W Morris 1930
  9. www.adamwishart.info/2007/02/the_terrible_st.html   The Canadian Medical Association Journal Dec 1940 
  10. Bell's Weekly Messenger, No.1829, Sunday, April 17, 1831
Ken True History of Surgery and Anaesthesia