Page:Frank Spearman--Whispering Smith.djvu/74

 deadliest storms, and its delightful summers contrast with the dreadest cold.

Here the desert of death simulates a field of cooling snow, green hills lie black in the dazzling light of day, limpid waters run green over arsenic stone, and sunset betricks the fantastic rock with column and capital and dome. Clouds burst here above arid wastes, and where dew is precious the skies are most prodigal in their downpour. If the torrent bed is dry, distrust it.

This vast mountain shed parts rivers whose waters find two oceans, and their valleys are the natural highways up which railroads wind to the crest of the continent. To the mountain engineer the waterway is the sphinx that holds in its silence the riddle of his success; with him lies the problem of providing a railway across ranges which often defy the hoofs of a horse.

The construction engineer studies the course of the mountain water. The water is both his ally and his enemy—ally because it alone has made possible his undertakings; enemy because it fights to destroy his puny work, just as it fights to level the barriers that oppose him. Like acid spread on copperplate, water etches the canyons in the mountain slopes and spreads wide the valleys through the plains. Among these scarcely known ranges of the Rocky Mountain chain the Western rivers 52