Thanks for the tip Wildbill - I’m going to download that book tonight.
Those old-time mountain men were super tough. As an interesting sidelight, Hugh Glass was reputed to have been an honest to goodness pirate before he became a fur trapper. When the big naval nations combined against piracy in the late 1700s and early 1800s I guess those adventurous guys had to find another line of work.
I read that book when it first came out and have reread it several times.