David Tilbrook passed away in the night yesterday. COVID-19, dammit. David had given a couple of talks at GTALUG. He was a long-time UNIX guy. We did CS degrees at the same time at the University of Toronto. He was an official member of DGP (I was only a guest) where (and when) the first U of T UNIX system was installed. We and Rob Pike worked on text editors (ed, qed), among other things. You know when a GUI interface changes the cursor symbol to indicate that the system is busy? He invented that. He was one of the founders of HCR, a Toronto UNIX software house. He did a lot of interesting things, knew a lot of interesting people, and had a lot of interesting stories. He has a good family too. I miss him. In fact, I've missed him for a year -- we were planning to visit when COVID showed up. "We" included Christopher Browne, now also passed.