They were doing experimental work on these particles at the Brookhaven accelerator. And I called up Courtenay Wright of our lab, who was visiting Brookhaven, and I said, ‘Courtenay, I understand they've found an event with a charged peculiar meson and a charged peculiar baryon. Is that right? He said, ‘Yes.’ I said, ‘Well, which was which, which was positive and which was negative?’ He said, ‘Oh, I don't know, does it matter?’ And I said, ‘Yes! It matters - because one of them is allowed and one of them is forbidden!’ Then he said, ‘I'll check’, and he left the phone for a little while, then he came back and he said that it was a… a positive meson and negative baryon. And I let out a whoop which he didn't understand at all because it confirmed the theory. And then it turned out there was a great excess of positive over negatives which nobody could explain in the cosmic rays as well as in the machines. So it looked as if, it began to look as if maybe it was right. Then I wrote up two other pre-prints which I never published. Herb Anderson at the Institute of Nuclear Studies was–who later lived out here and whose widow Jean still lives…  Still lives here, yes. …here. Well, I guess they were divorced at the very end and he married someone younger, but anyway, Jean still lives here. Herb Anderson was very enthusiastic about my work. He taught it in his class and he was very excited about it. And then Herb came rushing in to me one day and said, ‘Hey, do you know they've found a cascade particle? Can you explain that?’ And so I wrote another note called ‘On the Classification of Particles’ listing all the things that the theory would allow. And the cascade of course was one of them, and I predicted that it would–this was a negative one they'd found which I labelled psi minus—and I suggested that there had to be a psi zero, and of course when the psi zero was found they sent me the photo, which I had on the wall for a long time. If I can find it I'm going to put it back on the wall. Similarly, I predicted the sigma zero, I named the sigmas and I predicted the sigma zero, and then that was found and so on and so forth. And it was extremely exciting.