If you think about the times, you know, you have to think about what was happening to immunology and why those times didn't last. In a way, that was the last hoorah of the people who were not biochemists, didn't do molecular genetics, and didn't even handle immunologically active cells in vitro. I think you were the first person who started really looking at cells out of the- out of the immune system. Was there- I don't think there was probably a decent microscope there until you arrived. No there wasn't. That's right. So, immunology was changing drastically, and I was in the, I think, in the last phase before it did so. I mean, in a way, there was the biochemical approach with Peter asking us and Allan Williamson and- Well Rodney Porter above all And started with Porter. Yes. So there was a molecular and a cellular- That's true. arm to this. That's true. But the biochemistry of those days was difficult, enormously large-scale. I mean, Rod Porter, when he was working on immunoglobulin, used a suite of rooms to do what would now be done on, you know, a couple of gel plates. Yes. It was very different and very much more demanding. And therefore, more separated from the older biological approach, which John Humphrey and I were both taking.