"The most common effect I have noticed of the long hours is general deterioration of health; very general symptoms which we medically attribute to over-action, and debility of the nervous system; that includes a great deal more than what is called nervous disease, such as indigestion, constipation, a general slackness, and a great many other indefinite symptoms".

                                                                                                                      Dr. Percy Kidd, physician in Brompton and London Hospitals: