At one o’clock on the 10th of February, they began their climb up the mountain. For several hours their path wound up through the desolate ravines which separate the Sierra Negra from the peak. Great masses of volcanic rock were observed in fantastic shapes on every side, and on the entire face of the country, half covered with snow, could be read the signs of the savage convulsions which some day must have shaken the mountains to their foundations. On the morning of the 11th, the party resumed their march at two o’clock, and the ascent is thus described by Secretary Richardson: [Sidenote: THE ASCENT OF THE ORIZABA.] “We were six, all told, four Indians, Morphy, and myself. No party ever tried an ascent with better fellows for guides. They knew every inch of the ground, were strong and good-natured, and took a lively interest in the success of our enterprise. As we were the first to go up after the heavy storms, we went prepared to have a tough climb. The Indians said we would reach the top by ten o’clock, which was giving us seven hours to do it in. Under ordinary circumstances, and when the snow is in the best condition, the sulphur miners go up in five or six hours from the cave, but on the present occasion they had underestimated the difficulties. The snow was low down and very heavy, and long before the sun peeped up over the murky horizon, we were hopelessly launched upon the long, glistening slant, one end of which seemed reaching out to touch the stars, and the other shot far below us into a bank of clouds. “Sunlight found us on the south side of the mountain, on a level about equal to the height of the Sierra Negra. The ascent now began to be very laborious, and, for the first time, we began cutting foot-steps in the ice in order to proceed. When half way up the mountain, the route usually taken is along a ledge of rocks which reaches up out of the snow like the dorsal fin of a shark, and runs clear to the top. In this respect, Orizaba differs very much from its kindred peak, Popocatapetl. Sharp, jagged points of rock stick out all over its surface like the spines of a porcupine, while the summit of Popocatapetl is a clean, unbroken cone. These rocks on the slopes of Orizaba are one of the principal sources of danger in the ascent, as they often come tumbling down in great quantities; but at the time of our adventure, they were all held fast by the unusually heavy fall of snow. This was a point in our favor; but if we did not have to dodge rocks, there was no lack of active operations in other respects. The higher we went the more abrupt became the ascent, and the more uncertain the foothold. Ten o’clock came around, and the summit was still far above us.