The Category Seminar in Sydney

There has been a continuous series of category theory seminars in Sydney since 1970, and the 40th birthday is coming up. It was a crucial seminar in my scientific career, though I haven't been a part of it since around 1998. I owe much, in particular, to Max Kelly and Ross Street, and to the many visitors we had to Sydney.

I have not been able to determine the exact date of the first seminar, held at Macquarie University, but it was probably 23rd September 1970. The first date for which I have notes of a lecture in 7th October 1970: