I had an incredible reprint collection. And so did Francis actually. In fact, we put ours together and I've still got it, and this is reprints that go back to — at least in my case — to the mid 1940s and in Francis's later, and they were arranged alphabetically, so you had to know the author. And they are... I've still got all these boxes, it's about 100 boxes of reprints. I did cull them the other... because... just because of space storage... but they are wonderful because they showed... you had to write for all of these, and... and so they show you... they showed me at any rate what I'd read. And in fact I had a... I noticed that in Judson's history he referred to this paper of Kurt Stern with an early speculation on coding. Now I drew his attention to that because I had a reprint of this paper which I had got because I was an avid reader of the Yale Journal of Biology and Medicine, which of course nobody's ever heard of today and I found this article there and I wrote to Kurt Stern from South Africa, and I got a reprint, and I still have that reprint. So this could... so this is a style that I got accustomed to because in South Africa that's the only way you could get hold of interesting things to read. So reading I think is important, but I think knowledge is dangerous and, to... to research. I really think that a modicum of ignorance is... is absolutely essential. Because otherwise you don't try anything. And that's why I think in any line of research people can get saturated very quickly because they just know everything. And when a student comes and says, ‘Have you, why don't we try this?’ you tend to say ‘Oh, don't be silly, you know, that'll never work’. I had a student who did this, was Anand Sarabhai, a very good student, and he came to me one day and suggested an experiment and I said: ‘Look, I don't think it'll work, but please go ahead and try it’. So he went down to the cold room and he got two bottles of phage and he crossed them together and the experiment worked. Later we calculated what was the probability that those two bottles were at the front of the queue, because he just took the first ones. The probability was about a million, because I think there were 1000 bottles and the chances of getting two there is one over 1000². So it was a million to one. But he had what we called the luck of the Sarabhais and so it worked, so after that everybody asked him to choose the bottles, because that was one way of getting your experiments to work.