So during the course of my sort of dual career as a kind of reluctant medical student, together with being a practising scientist and I should say, also later on, a lecturer in physiology and a tutor all at the same time, I have come to the conclusion I've got to go abroad, and after the war, of course, many people did. I had already turned down this offer of Le Gros Clark but thought, this is really what I wanted to do, and in… I think it was 1948, Waddington came out to South Africa and... myself and a very good friend called George Clayton, and… were asked to look after him. We became responsible for this, Waddington was a great physiologist… embryologist and part of the school, and remained after that a friend for life. And he told me about Cambridge and all the interesting things that were going on in biochemistry in Cambridge. He had just moved to Edinburgh to start this – he said of course I could come to Edinburgh but if I wanted to go to Cambridge, that's where biochemistry was going. So I thought: well, I'll apply to Cambridge. So I applied; I wrote to Chibnall, who was then the professor, and I never got a reply. In the meantime, the principal of my university, Humphrey Raikes, a very great man, I had told him that I really wanted to go to England; I wanted to do this. So he said to me, 'Well there is a man at Oxford who is interested in these things; he's called Hinshelwood', because it turned out that Humphrey Raikes was a physical chemist at Oxford and knew about Hinshelwood, and his college was Exeter College and Hinshelwood was a… he... he was Dr Lee's Professor of Physical Chemistry there, and Hinshelwood had written a book called The Chemical Kinetics of the Bacterial Cell.