Came as a shock to see Murray in this thread. He was a colleague of mine, had the office across the hall. He had a lot of health problems, which led to his taking early retirement, and, alas, to his early passing, 15 April 2002, just weeks after his post to this thread. There's a bit about him at http://www.maths.mq.edu.au/~street/CoACT.2001.html