Success such as theirs is cumulative: when the work is done one man stands for it, but it represents the work of a thousand men in every walk of American industry. Where the credit must lie with the engineer who achieves is in the application of these enormous reserves of industrial triumphs to the particular conditions he faces in the problem before him; in the application lies the genius called success, and this is always new. Moreover, men like Glover and McCloud were fitted for a fight with a mountain river because trained in the Western school, where poverty or resource had sharpened the wits. The building of the Crawling Stone Line came with the dawn of a new day in American capital, when figures that had slept in fairies' dreams woke into every-day use, and when enlarged calculation among men controlling hitherto unheard-of sums of money demanded the best and most permanent methods of construction to insure enduring economies in operating. Thus the constructing of the Crawling Stone Line opened in itself new chapters in Rocky Mountain railroad-building. An equipment of machinery, much of which had never before been applied to such building, had been assembled by the engineers. Steam-shovels had been sent in battalions, grading-machines and dump-wagons had gone forward in trainloads, and an army of men were operating in the valley. A huge steel bridge three thousand feet long was now being thrown across the river below the Dunning ranch. The winter had been an unusual one even in a land of winters. The season's fall of snow had not been above an average, but it had fallen in the spring and had been followed by excessively low temperatures throughout the mountains. June came again, but a strange June. The first rise of the Crawling Stone had not moved out the winter frost, and the stream lay bound from bank to bank, and for hundreds of miles, under three feet of ice. When June opened, backward and cold, there had been no spring. Heavy frosts lasting until the middle of the month gave sudden way to summer heat, and the Indians on the upper-valley reservation began moving back into the hills. Then came the rise. Creek after creek in the higher mountains, ice-bound for six months, burst without warning into flood. Soft winds struck with the sun and stripped the mountain walls of their snow. Rains set in on the desert, and far in the high northwest the Crawling Stone lifting its four-foot cap of ice like a bed of feathers began rolling it end over end down the valley. In the Box, forty feet of water struck the canyon walls and ice-floes were hurled like torpedoes against the granite spurs: the Crawling Stone was starting after its own.