Higgs object

Dear topos theorists, Recently I found myself coming across Higgs' object. I only know two references that mention it, the Elephant, and Freyd's paper "Choice and well-ordering". Is there an original paper by Denis Higgs, or at least a manuscript by him that you may have seen or have available? When was the first time the Higgs' object showed up in topos theory? References or recollections are welcome. Thanks, Martin ---------- You're receiving this message because you're a member of the Categories mailing list group from Macquarie University. Leave group: https://outlook.office365.com/owa/categories@mq.edu.au/groupsubscription.ashx?source=EscalatedMessage&action=leave&GuestId=6bf90c14-94d1-45b7-a0b5-9dd447734d27