Outside there was shimmering heat and dry, thirsty sand, miles upon miles of it flashing by in a gray, barren blur. A flat, arid, monotonous land, vast, threatening, waterless, treeless. Its immensity awed, its bleakness depressed. Man's work here seemed but to accentuate the puny insignificance of man. Man had come upon the desert and had gone, leaving only a line of telegraph-poles with their glistening wires, two gleaming parallel rails of burning steel to mark his passing.