First, let me thank Professor Lemay for taking on the laborious and time-consuming job of running Catlist in its current incarnation. But looking to the past (and future as well), is there an archive somewhere of past posts to the Catlist? What prompts that question: Some years ago there was a most interesting exchange of views between Professors Bénabou and Johnstone over optimal ways to formulate topos theory. The argument got so heated that the moderator, Bob Rosebrugh, ended the discussion. I think it would be of value to have a retrievable record of that debate. Anyhow, that is just one example of the value of having a retrievable record of what categorists have said on the list. You're receiving this message because you're a member of the Categories mailing list group from Macquarie University. To take part in this conversation, reply all to this message. View group files<https://outlook.office365.com/owa/categories@mq.edu.au/groupsubscription.ashx?source=EscalatedMessage&action=files&GuestId=6bf90c14-94d1-45b7-a0b5-9dd447734d27> | Leave group<https://outlook.office365.com/owa/categories@mq.edu.au/groupsubscription.ashx?source=EscalatedMessage&action=leave&GuestId=6bf90c14-94d1-45b7-a0b5-9dd447734d27> | Learn more about Microsoft 365 Groups<https://aka.ms/o365g>