Dear Anders Thank you for that tribute and interesting history particularly poignant on Bill's birthday. On 9 Feb 2023, at 2:39 am, Anders Kock <kock@math.au.dk> wrote: In my world picture, I felt that I had the privilege of seeing Category Theory, as a subject in its own right, come into being. That reminds me, and perhaps I have mentioned this before? Sammy Eilenberg told me once that each category theorist must have a special category on which they are expert. I told that to John Gray who said: Ross, the time has come for that category to be Cat. John's graduate course on category theory was based on that philosophy, heavily influenced by Bill's LaJolla paper. Ross [For admin and other information see: http://www.mta.ca/~cat-dist/ ]