Chapter 6

"Parts, especially upper parts, seem to be of lighter-colored rock than any visible strata on slopes proper, hence an evidently crystalline origin. Close flying shows many cave mouths, some unusually regular in outline, square or semicircular. You must come and investigate. Think I saw rampart squarely on top of one peak. Height seems about thirty thousand to thirty-five thousand feet. Am up twenty-one thousand five hundred myself, in devilish, gnawing cold. Wind whistles and pipes throu…