Peter Matthiessen Dies at 86 7 April, 201419 November, 2014 / Mike H. Sad to hear that Peter has passed away this weekend. Peter Matthiessen Dies at 86 | News from the Field | OutsideOnline.com. This book “The Snow Leopard” is a must read and if you don’t want to read the whole thing, you can find some of his quotes here on my website. Mike H.Hi there, I am photographer, father, son and ultimate frisbee player. I've recently switched my career path into Mechanical Engineering. As someone once said, "What a long, strange trip it's been."