I remained on the… on the payroll, so to speak, at Fox Chase, during all this stuff. I very often didn't get… didn't get a salary, but you know, I was still, kind of, part-time. And I maintained my office, and I was back here, you know,  quite often. So I've had this, since 1964, you know, I've been on the, you know, paying social security and… and so forth through… through Fox Chase. Well, when I… when I came back, I… I got sort of… sort of restless for a while. I didn't, I thought it would be unwise to try and start up a new laboratory again. Part of it was practical, you know, when you're what 80, or something, or late 70s, you don't want to hire… have young scientists come in and work with you, it's not very good prospects, you know, for their career. And starting up a whole new lab… and in a way, I mean I was sort of tempted to apply for grants, but one of them was, if I… if I didn't get the grant, I'd be disappointed, then if I got the grant, I'd say, well, I'm being competitive with these young scientists who, you know, the money was kind of scarce. So, on balance, I didn't think it was a good thing. And I think you sort of, after a while, scientists may kind of taper down, so to speak. I mean, I feel I still have a lot of new ideas and… and fresh approaches, but it's… it's probably best exerted by, you know, talking to people, you know, and telling them about, in the hope that some of the ideas are good enough, so somebody will do them. And you never know, you know, sometimes you give a lecture... I told you the story about the Gender Ratio, that somebody had read the book by chance. Well, you never quite know how that's… how that’s going to happen, but I feel I do have an obligation, you know, to talk about it.