Again on the trail before the sun had risen above the horizon, the herd was sent forth on another day's hard drive, which carried it, with the constantly growing tail herd of stragglers, far into the following night, despite all dumb remonstrances. No mercy was shown to it, but only a canny urging, and if no mercy was shown the cattle none was accepted by the drivers, who rode and worked, swore and panted on wiry ponies which, despite frequent changing, began to show the marks of their efforts under the pitiless sun and through the yielding sands. Both cattle and horses had about reached their limits when the late afternoon of the next day brought them to a rocky ledge sticking up out of the desert's floor, which now was hard and stony; and upon turning the south end of the ridge an emerald valley suddenly lay before their eyes, from whence the scent of water had put a new spirit into cattle and horses for the last few miles; and now it nearly caused a fatal stampede at the entrance to the narrow ledge which slanted down the steep, rock walls. To a stranger such a sight would have awakened amazed incredulity, and strong suspicion that his sanity had been undermined by the heat-cursed, horror-laden desert miles; or he might have sneered wisely at so palpable a mirage, scorned to be tricked by it in any attempt to prove it otherwise and staggered on with contemptuous curses. But Miguel and the men he so autocratically bossed knew it to be no vision, no trick of air or mind, and sighed with relief when it finally lay before them. While they all knew it was there and had visited it before, none of them, except Miguel, had ever learned the way, try as they might, for until the high ledge of rock, hidden on the west by a great, upslanting billow of sand, came into sight there were no landmarks to show them the way. Each new journey across the simmering, shimmering plateau found fears in every heart but the guide's that he would lose his way. That their fears may be justified and to show them blameless in everything but their lack of confidence in him, it may be well to have a better understanding of this desert and what it meant; and to show why men should hold as preposterous any claim that a cattle herd could safely cross it. Some went even further and said no man, mounted or not, could make that journey, and confessed to themselves a superstitious fear and horror for it and everything pertaining to it.