Parker and Browne camped along the Muldrow Glacier, now a magnificent central feature of the park. Then they made for McKinley summit. Striking the Denali Glacier, they ascended it with a dog train to an altitude of eleven thousand feet, where they made a base camp and went on afoot, packing provisions and camp outfit on their backs. At one place they ascended an incoming glacier over ice cascades, four thousand feet high. From their last camp they cut steps in the ice for more than three thousand feet of final ascent, and attained the top on July 1 in the face of a blizzard. On the northeastern end of the level summit, and only five minutes' walk from the little hillock which forms the supreme summit, the blizzard completely blinded them. It was impossible to go on, and to wait meant rapid death by freezing; with extreme difficulty they returned to their camp. Two days later they made a second attempt, but were again enveloped in an ice storm that rendered progress impossible. Exhaustion of supplies forbade another try, and saved their lives, for a few days later a violent earthquake shook McKinley to its summit. Later on Mr. Browne identified this earthquake as concurrent with the terrific explosive eruption which blew off the top of Mount Katmai, on the south coast of Alaska. The following spring the Stuck-Karstens party made the summit upon that rarest of occasions with Mount McKinley, a perfect day. Archdeacon Stuck describes the "actual summit" as "a little crater-like snow basin, sixty or sixty-five feet long, and twenty to twenty-five feet wide, with a hay-cock of snow at either end--the south one a little higher than the north." Ignoring official and recognized nomenclature, and calling McKinley and Foraker by their Kuskokwim Indian names, he writes of Mount Foraker: "Denali's Wife does not appear at all save from the actual summit of Denali, for she is completely hidden by his South Peak, until the moment when his South Peak is surmounted. And never was nobler sight displayed to man than that great isolated mountain spread out completely, with all its spurs and ridges, its cliffs and its glaciers, lofty and mighty, and yet far beneath us." "Above us," he writes a few pages later, "the sky took on a blue so deep that none of us had ever gazed upon a midday sky like it before. It was deep, rich, lustrous, transparent blue, as dark as Prussian blue, but intensely blue; a hue so strange, so increasingly impressive, that to one at least it 'seemed like special news of God,' as a new poet sings. We first noticed the darkening tint of the upper sky in the Grand Basin, and it deepened as we rose. Tyndall observed and discussed this phenomenon in the Alps, but it seems scarcely to have been mentioned since."