It was January ’61 when I worked it out and very soon I completed it and I was feeling in a… I was in a very good mood that year,  my mental health was very good, I was brimming with mental health. So as soon as I finished it I wrote it up as a Caltech report. I didn't know that a Caltech report wasn't a publication,  that it was just a pre-print. I assumed if I wrote something up as a Caltech report it was a… it was a paper, because Caltech reports were brand new, they'd just been started: Syncotron Laboratory Research Reports and I assumed they were… constituted publication. Anyway, I wrote it up, but I was a little worried about it because there were a number of issues that were unresolved. And those I have discussed in the paper that I gave later in Catalonia in 1983, Sant Feliu de Guíxols. I was worried because of the clash between the strong interaction and the weak interaction theory if they were both Yang-Mills theories in the same charge space, because in that paper I had an SU(3) Yang-Mills theory for the strong interaction. I also used the charges for a higher symmetry of the strong interactions beyond isotopic spin, and that worked beautifully: that gave me the super multiplets; the mass rule. If one put in splitting by eighth component of the octet, the mass rule worked very well; lots of other things seemed very good. But I was worried about the Yang-Mills theory for the strong interactions clashing with the Yang-Mills theory for the weak interactions. I was worried about how to make the theory renormalizable because one had to introduce violations and I knew that those destroyed the renormalizability. So in the pre-print I advertised for a weak… a… a soft mass breaking mechanism, not thinking that if I revisited our work on the sigma model I might get that mechanism. But anyway, I asked for one. There were other things that bothered me, too.