At the National Institute for Medical Research, I came into contact with biological scientists and formed collaborative projects with several of them. In particular, George Popjak and I shared an interest in cholesterol.

In 1962, Popjak and I left the service of the Medical Research Council and became co-directors of the Milstead Laboratory of Chemical Enzymology set up by Shell Research Ltd.

I was born on 7 September 1917 at Sydney in Australia. My father was English-born and a graduate of Oxford; my mother, born Hilda Eipper, was descended from a German minister of religion who settled in New South Wales in 1832. I was the second of four children.

Throughout my scientific career, my wife has been my most constant collaborator. Her experimental skill made major contributions to the work; she has eased for me beyond measure the difficulties of communication that accompany deafness; her encouragement and fortitude have been my strongest supports.

After a year of post-graduate research, I won an 1851 Exhibition scholarship to work at Oxford with Robert Robinson. Two such scholarships were awarded each year, and the other was won by Rita Harradence, also of Sydney and also an organic chemist.

In a world where it is so easy to neglect, deny, corrupt and suppress the truth, the scientist may find his discipline severe. For him, truth is so seldom the sudden light that shows new order and beauty; more often, truth is the uncharted rock that sinks his ship in the dark.