National Geographic : 1935 Mar
THE CONQUEST OF MOUNT CRILLON I I A HUMAN LADDER LEADS TO A PERILOUS OVERHANGING LIP Two climbers shod with long iron spikes called crampons balance on a small pinnacle of snow covered ice, while a third, his ice ax jammed deep in the snow below, stands guard in case of a slip. All are roped together. The man groping with his ice ax for a firm hold in the cliff's upper lip will climb over the back of the man in front of him and thus reach the bottom of the long ice slope leading to Mount Crillon's upper plateau (see illustration, page 389). 387 d~ FI~ "