They returned to the camp on the col and packed up ten days' rations. With tremendous difficulty they transported them up to a 15,000-feet camp on the ridge, where they were on the edge of the big glacier-filled basin between the two summits. All three found their health beginning to suffer. The pemmican proved to be impossible food, giving them all violent stomach pains, and they were forced to confine themselves to tea and hard-tack. The cold was intense, and inside the tent, with the alcohol stove burning and the warmth of three bodies, the temperature at 7.30 p.m. was five degrees below zero, and three hours later nineteen degrees below zero. "Despite elaborate precautions," says Mr. Belmore Browne, "I can say in all honesty that I did not have a single night's normal sleep above 15,000 feet on account of the cold." By this time their appearance was, as Mr. La Voy said, "sufficient to frighten children into the straight and narrow path." All were more or less snow-blind, burnt black, unshaven, with lips, noses, and hands swollen, cracked, and bleeding. On 27th June the packs were carried in relays to just under the last serac, which was the highest point in the big basin. The altitude was 16,615 feet. Their one comfort was that a snow-field seemed to lead easily up to the sky-line of the central North-East ridge, and that from there they saw what appeared to be a reasonable gradient to the final summit. On 28th June they rested and prepared for their last effort. They were now convinced that nothing could stop them except storm. The night was fine, and the weather promised well for the morrow. The summit appeared to them to be nearly flat with a slight hummocky rise, which must be the highest point in North America. On 29th June they left camp at 6 a.m., moving very quietly and steadily and conserving their strength. Mr. La Voy and Mr. Belmore Browne led alternately. Slowly they made their way up the snow slopes at the rate of about 400 feet an hour. At 18,500 feet they stopped and congratulated each other, for they had beaten the Duke of the Abruzzi's record on Mount St. Elias. Presently they were on the sky-line of the ridge, and looking down on the arena where they had struggled two years before. Now, for the first time, came a threat from the weather. The sky was clear to the north, but from the south a great sea of clouds rolled against the mountain like surf on a shore.