[4] He joined the 1933 Everest expedition led by Hugh Ruttledge as senior doctor, chief intellect, and a competent mountaineer of gigantic physique, being over 6 ft 4in.
[6] During World War II he worked as a doctor with Special Operations Executive (SOE) and as advisor to the armed forces on the effects of high altitude and cold on the human body.
[3] His work with Katharina Dalton resulted in the coining of the term "Premenstrual syndrome" and their research into the subject was subsequently used in criminal cases involving women accused of infanticide and other violent crimes.
[1] He was a fellow of the Royal Zoological Society and diagnosed and treated thyroid problems in Guy the Gorilla at the London Zoo.
[6] He was also medical advisor to President Charles de Gaulle during his state visit to England in 1960 and was awarded the Legion of Honour of France.