The next day all of us felt very tired and drowsy. In fact, I was almost overcome with inertia. It was a fearful task even to lift one's hand. The sun had burned our faces terribly. Our lips were painfully swollen. We coughed and whooped. It seemed best to make every effort to get back to a still lower altitude for the mules. So we broke camp, got the loads ready without waiting, put our sleeping-bags and blankets on our backs, and went rapidly down to the Indians' huts. Immediately our malaise left us. We felt physically stronger. We took deep breaths as though we had gotten back to sea level. There was no sensation of oppression on the chest. Yet we were still actually higher than the top of Pike's Peak. We could move rapidly about without getting out of breath; the aggravating "whooping cough" left us; and our appetites returned. To be sure, we still suffered from the effects of snow and sun. On the ascent I had been very thirsty and foolishly had allowed myself to eat a considerable amount of snow. As a result my tongue was now so extremely sensitive that pieces of soda biscuit tasted like broken glass. Corporal Gamarra, who had been unwilling to keep his snow-glasses always in place and thought to relieve his eyes by frequently dispensing with them, now suffered from partial snow-blindness. The rest of us were spared any inflammation of the eyes. There followed two days of resting and waiting. Then the smiling arrieros, surprised and delighted at seeing us alive again after our adventure with Coropuna, arrived with our mules. The Tejadas gave us hearty embraces and promptly went off up to the snow line to get the loads. The next day we returned to Chuquibamba. In November Chief Topographer Hendriksen completed his survey and found the latitude of Coropuna to be 15° 31' South, and the longitude to be 72° 42' 40'' West of Greenwich. He computed its altitude to be 21,703 feet above sea level. The result of comparing the readings of our mercurial barometer, taken at the summit, with the simultaneous readings taken at Arequipa gave practically the same figures. There was less than sixty feet difference between the two. Although Coropuna proves to be thirteen hundred feet lower than Bandelier's estimate, and a thousand feet lower than the highest mountain in South America, still it is a thousand feet higher than the highest mountain in North America. While we were glad we were the first to reach the top, we all agreed we would never do it again! CHAPTER III To Parinacochas