Shortly before five o'clock the clouds had begun to pile up in the east, and their gigantic forms, flowing outlines, and glorious lighting were the only things that caused the electrical effects to be forgotten even momentarily. The clouds formed into a long, solid, rounded range that rose to great height and was miles in length. The southern end of this range was in the haze, and I could not make out its outline further south than a point about opposite Loveland, Colorado, nor could I see the northern end beyond a few miles north of Cheyenne, where it was cut off by a dozen strata of low clouds that moved steadily at a right angle to the east. Sixty miles of length was visible. Its height, like that of the real mountains which it paralleled, diminished toward the north. The place of greatest altitude was about twenty-five miles distant from me. From my location, the clouds presented a long and smoothly terraced slope, the top of which was at least five thousand feet and may have been fifteen thousand feet above me. The clouds seemed compact; at times they surged upwards; then they would settle with a long, undulating swell,
as if some unseen power were trying to force them further up the mountains, while they were afraid to try it. Finally a series of low, conical peaks rose on the summit of the cloud-range, and the peaks and the upper cloud-slope resembled the upper portion of a circus-tent. There were no rough places or angles.
When darkness came on, the surface of this cloud-range was at times splendidly illuminated by electricity beneath; and, when the darkness deepened, the electrical play beneath often caused the surface to shine momentarily like incandescent glass, and occasionally sinuous rivers of gold ran over the slopes. Several times I thought that the course of these golden rivers of electrical fire was from the bottom upward, but so brilliant and dazzling were they that I could not positively decide on the direction of their movement. Never have I seen such enormous cloud-forms or such brilliant electrical effects.
The summit of Specimen Mountain, from which I watched the clouds and electrical flashes, is about twelve thousand five hundred feet above sea-level. A calm prevailed while I remained on top.
It was about 8.30 p. m. when I left the summit, on snowshoes, and swept down the steep northern slope into the woods. This hurry caused no unusual heart or muscle action.
The next morning was cloudy as low down as ten thousand five hundred feet, and, for all I know, lower still. The night had been warm, and the morning had the oppressive feeling that dominated the morning before. The clouds broke up before nine o'clock, and the air, with haze in it, seemed yellow. About 10.30, haze and, soon after, clouds came in from the southeast (at this time I was high up on the southerly slope of Mt. Richthofen), and by eleven o'clock the sky was cloudy. Up to this time the air, when my snow-glasses were off, burned and twitched my eyes in the same manner as on the previous morning.
Early in the afternoon I left Grand Ditch Camp and started down to Chambers Lake. I had not gone far when drops of rain began to fall from time to time, and shortly after this my muscles began to twitch occasionally under electrical ticklings. At times slight muscular rigidity was noticeable. Just before two o'clock the clouds began
to burst through between the trees. I was at an altitude of about eleven thousand feet and a short distance from the head of Trap Creek. Rain, hail, and snow fell in turn, and the lightning began frequently to strike the rocks. With the beginning of the lightning my muscles ceased to be troubled with either twitching or rigidity. For the two hours between 2 and 4 p. m. the crash and roll of thunder was incessant. I counted twenty-three times that the lightning struck the rocks, but I did not see it strike a tree. The clouds were low, and the wind came from the east and the northeast, then from the west.