This is a pretty gross generalization, and not one that I recall Wade Davis (the best boo I have read so far on Mallory) adopts; He does go into the fiddly natu

This is a pretty gross generalization, and not one that I recall Wade Davis (the best boo I have read so far on Mallory) adopts; He does go into the fiddly nature of the O2 tanks a lot - The oxygen apparatus was new to everyone back then, and Irvine was there because he was the most proficient in it's use.