Ken, here are two web links regards Dr. Lowder's untimely death, I've asked a couple of PCTA members if they have any more info but have not yet heard back from them.
The few times I was lucky enough to have worked trail with him I remember his remarkable enthusiasm for the task at hand and the fact that he was always smiling.
Rootball, thanks very much for the links. I did not know the details of this. I'm giving a presentation on ice axe use at the Kick-Off, and it is always good to know specific history.