Landor's troop, with one other, was in the San Andres Mountains of New Mexico when Cairness joined it. They were on the trail of a large band of renegades, and it led them through the mountains, across the flats, and down to the lava beds. Once in the æons which will never unfold their secrets now, when the continent of the Western seas was undreamed of by the sages and the philosophers of the Eastern world, when it was as alone, surrounded by its wide waters, as the planets are alone in their wastes of space, when it was living its own life,--which was to leave no trace upon the scroll of the wisdom of the ages,--the mountains and the bowels of the earth melted before the wrath of that same Lord whose voice shook the wilderness of Judæa. At His bidding they ran as water, and poured down in waves of seething fire, across the valley of death. It is a valley of death now, parched and desolate, a waste of white sand--the dry bone dust of the cycles. But then, when the lava came surging and boiling and flaming across the plain, not a thin stream, but a wide, irresistible current, there was life; there was a city--one city at least. It is there now, under the mass of sharp, gray, porous rock; how much of it no one knows. But it is there, and it has given up its unavailing hints of a life which may have been older than that of Herculaneum and Pompeii, and is as much more safely hidden from the research of the inquiring day as its walls are more hopelessly buried beneath the ironlike stone than are those of the cisalpine cities beneath their ashen drift. And the great river of rock is there, too, frozen upon the land like some devouring monster changed by a Gorgon head into lifeless stone. It is a formidable barrier across the hardly less formidable bad lands. It can be crossed in places where it is narrowest, not quite a mile in width, that is. But horses slip and clamber, and men cut through the leather of their heaviest shoes. If the sea, whipping in huge waves against the fury of a typhoon, were to become on the instant rocks, it would be as this. There are heights and crevasses, hills and gulches, crests and hollows, little caves and crannies, where quail and snakes and cotton-tails and jack-rabbits, lizards and coyotes, creatures of desolation and the barrens, hide and scamper in and out. It is an impregnable stronghold, not for armies, because they could not find shelter, but for savages that can scatter like the quail themselves, and writhe on their bellies into the coyotes' own holes. And so the hostiles took shelter there from the cavalry that had pursued them hard across the open all night, and gave battle after the manner of their kind. It was a very desultory sort of a skirmish, for the troops did not venture into the traps beyond the very edge, and the Indians were simply on the defensive. It was not only desultory, it promised to be unavailing, a waste of time and of ammunition.