 What doesn't Baron think was a reason for their failure?
He had no stomach for mysteries, vast or trifling, and there were pressing things to think about at this time. Yet the doorman had flagged him as he came in from the street: “A thousand pardons, Mr. Baron. Across to the right was a group that Baron knew vaguely—Andean climbers, or at least two of them were. Presently a small, grizzled man crossed the room and sat down at Baron’s table. Baron’s eyes were wide with excitement, all trace of anger gone. I guess I was about ten when Wyatt and Carpenter made the last attempt—that was in 2082, I think. Then he made the attempt on Vulcan Crater that paved the way for Balmer a few years later.
 the Major's experience
 McIvers  the Major's experience  poor mapping  faulty equipment