Isaiah Bowman, The Andes of Southern Peru
“ The timber line is as sharply marked as the edge of a cultivated field. At a point just beyond the huts of Pampaconas one may stand on a grassy spur that leads directly up—a day’s journey—to the white summits of the Cordillera Vilcapampa. Yet so near him is the edge of the forest that he is tempted to try to throw a stone into it. In an hour a bitter wind from the mountains may drive him to shelter or a cold fog come rolling up from the moist region below. It is hard to believe that oppressive heat is felt in the valley just beneath him. ”
