Personal motivations change, don't they, they change- I find they change even almost in a few minutes conversation with somebody, a person with real insight. You can see a relationship between a medical problem and a problem in biochemistry or genetics which you sort of may have been partly aware of, but these ideas sort of crystallise as you go along. That's a very wishy-washy answer, isn't it, and I don't think I can really- but I don't think I do have a clear answer to that.
Do you think you moved more towards medical when you moved to Germany and in the later part of your scientific life, is that a sequence you recognise?
Yes, well I think I can say I moved in a medical direction almost when I left Edinburgh. I started- you see, my- my- I think my own life has been one of moving in medical direction. Funny, I remember talking to my brother, Murdoch, just when I was leaving Edinburgh when I'd decided to go to the National Institute of Medical Research and he tried to dissuade me, and I remember him saying, he said if you go there you will leave science and you will become a servant of medical research- and I think he was right, and something's lost and something is gained when one transits like that.