Well that dinner in Annie's, I always think at that stage I was... I was really more a back… listening in. Graeme Segel had made a lot of earlier ideas on... on conformal theory, but it was really Witten who took charge that evening and, sort of, put it all together and showed how to go about it. But earlier on my... my role, I think, had been to interest Witten in the Jones invariants and say, ‘Look at these invariants; they look jolly interesting and they should have something to do with gauge theory. Here are a few ideas’. My ideas weren't quite right, but it was all pushed in the direction.

And I'd learnt from Graeme Segel about his axiomatic approach to conformal field theory, and I was trying to formulate similar approaches to Donaldson theory, and that pushed Witten in the direction. So I was... I was acting in the background, providing a bit of, sort of, stimulus and encouragement, and Ed Witten was doing all the work and Graeme on the other hand was, sort of, suggesting other ideas. It was a, sort of, interesting mixture, and the dinner, of course, was the nice culmination of it, but it had been going on for a while at different levels.