Though prepared by Seyd’s descriptions for something unusually fine, Billy’s blue eyes opened to the limit, and he sat silent upon his mule, staring, altogether bereft of his usual loquacity. From their feet the land broke suddenly and fell into purple depths from which dark hills uplifted ruddy peaks into the blaze of the setting sun. The Barranca was so deep, so vast in scale, that he grew dizzy in following with his eye the tiny zigzag of the trail down, down, till it was lost in blue haze through which even the giant ceibas and tall cedars showed like microscopic plants. Across the valley, miles away, naked mountains tossed and tumbled, seamed, scarred, gashed by slide and quake, sterile and desolate, as on the far day that some world convulsion raised them out of the sea.
“Drunk! drunk!” Billy breathed, at last. “Nature gone on a jag. Drunken mountains loose in a crazy world. The whole earth is turned on edge. Hold me, Bob, before I fall in. How deep do you call this bit of a hole?”
“About five thousand feet down to the floor. It falls off a thousand and more in a few miles to the coast. You see, we are still in touch with the old Pacific. Can’t be more than thirty miles or so down to the sea.”
“The dear old pond. Isn’t that pine on the other side?”
“Sure. An American company is taking out millions of feet, a hundred or so miles farther up. That’s a great old tree, and quite particular about the company it keeps. Look how sharply it draws the line along the slope, lifting its skirts from the contamination of the tropics. That spark of green in the far distance is sugar cane—two thousand acres of it on the General’s hacienda of San Nicolás. And you see the gash over there, all yellow and green, about three thousand feet down from the top—that is us, señor, the mina Santa Gertrudis. And that reminds me—we’ll have to be moving if we are to make the inn before midnight. Vámonos, Carlos.”
But the muleteer shook his head. “After you, señor, for if these devils should take to running again, not in six months should we fish your baggage out of the canyons.”
Leading down the trail, which zigzagged along the faces of a V-shaped wall, Seyd perceived, as he thought, the soundness of the argument, for at the first turn a stone from his mule’s foot dropped five hundred feet plumb before rebounding into greater depths, and at no place did the width of the path allow an unnecessary inch for the swing of the packs. Deceived by the succession of stairways through which the trail dropped down to the thin thread that marked its course along the bottoms, Billy objected:
“Three hours, you say? Looks to me as though we could make it in one.”
“Less than that—if your mule should happen to slip and take it sideways. Let me see—allowing a thousand feet to a bump, about fourteen seconds ought to distribute you nicely among the bottom trees. But if you elect to follow me around the eight or nine miles of trail you cannot see, it will take the full three hours.”
Even while he was speaking the ruddy fires on the valley hills were suddenly extinguished, only the stark peaks on the other side lifted like yellow torches in the last blaze. One by one these also went out, and another hour found them journeying in gloom that was intensified rather than lightened by the section of moon which achieved a precarious balance on the rim above. In darkness and silence that was broken only by the scrape of hoofs and rattle of displaced stones they followed down and down and down, until Billy presently came under a singular hallucination. Repeatedly he put out his hand to repel the rock wall that seemed to be animated with a desire to crowd him off into the canyon, and because of this pardonable nervousness he endured a real trial that would have drawn a quick protest from Seyd—to wit, the senseless way in which the muleteers were driving their beasts on his heels. Twice he rapped a rough nose that tried to force its way in between him and the wall, and he breathed more easily when an easier grade permitted them to draw ahead on a gentle trot.
Accustomed, on his part, to leave all to his beast, Seyd rode with a loose bridle, lost in thought, his mind busy with mining plans. And thus it was that when Paz suddenly stopped, snorting, at the end of a trot which had carried them well ahead of the train around a rock wall, he almost went over her head. Recovering quickly, he was about to drive in the spurs; and a man of slower intuitions would surely have done it. With him, however, action invariably preceded thought, from instincts almost as acute as those which had brought the mule to a stop. Dismounting, he stepped ahead. Then, to the horror of Billy, who heard the burros slipping and sliding as they came round the wall on a trot, his voice came back.
“Hold on, there! A slide has carried away the trail!”
IV
Although he had always doubted the phenomenon, Billy’s hair stood on end, and when, in the face of Seyd’s shouts in Spanish to stop, the burros still came on he felt his cap move.
“Billy!” Seyd’s command rang out sharply. “Dismount
