When out of sight of the trail, he climbed up a soft clay slope and, lying flat at the top, he peeped over. More yellow ridges like the ribs of a washboard! They seemed to run out on all sides, in a circling maze, soft and curved and colorful, and shaded by what seemed unnatural shadows. But they were almost level. Here indeed was the pit of the amphitheater. With slow, desert-trained gaze Adam swept the graceful dunes. All bare! The twilight of changing yellow shadow hindered sure sight at considerable distance, and the sweeping rush of wind above, and then a low hollow roar, made listening useless.
At length Adam noticed how all the clay ridges or ends of slopes to his right ran about a hundred yards and then sheered down abruptly. Here, then, was the main canyon through which the trail ran. The line of it, a vague break in the yellow color, turned toward Adam’s left. Adam deliberated a moment. Would he go on or return to the trail? Then he rose, crossed the top of the clay ridge, plunged down its soft bank, leaped the sandy and gravelly wash at the bottom, and started up the next ridge. This was exactly like the one he had surmounted. Adam kept on, down and up, down and up, until the yellow twilight in front of him appeared separated by a lazy column of blue. Adam’s nostrils made sure of that. It was smoke. Cautiously crawling now, down and up, Adam gained the ridge from behind which rose the smoke. Here he crouched against the soft clay, breathing hard from his exertions, listening and peering.
The ridges about him began to show streaks of brown earth and ledges of rock. As he looked about he was startled by a rumbling, grating sound. It was continuous, but it had louder rumbles, almost bumps. The sound was rock grating on rock. Adam thought he knew what made it. With all his might he listened, pressing his ear down on the clay. The rumble kept on, but Adam could not hear any other sound until there came a lull in the wind above. Then he heard a squeaking creak—a sound of wood moved tight against wood; then sharp cracks, but of soft substances; then the ring of a shovel on stone; and at last harsh voices.
So far, so good, thought Adam. Only a few yards of clay separated him from mining operations, and he must see how many men were there and what was the lay of the land, and how best he could proceed. The old animal instinct to rush animated him, requiring severe control. While waiting for the wind to begin again, Adam wondered if he was to see Dismukes. He did not expect to.
The elements seemed to await Adam’s wishes. At that very moment the yellow light shaded a little dimmer and the sinister-hued sun cloaked its ruddy face. The gale above howled, and the circling winds, lower down, gathered up sheets of dust and swept them across the shrouded amphitheater. And a wave of intenser heat moved down into the pit.
Adam sank his fingers into the soft clay and crawled up this last slope. The rattle of loosened clay and gravel rolling down was swallowed up in the roar of wind. Reaching the last foot of ascent, Adam cautiously peeped over. He saw a wider space, a sort of round pocket between two yellow ridges, that ran out and widened from a ledge of crumbling rock. He crawled a few inches farther, raised himself a little higher. Then he saw brush roofs of structures, evidently erected for shade. The rumble began again. Higher Adam raised himself. Then he espied a coat hanging on a corner post of one of the structures. Dismukes’ coat! Adam could have picked it out of a thousand coats. Excitement now began to encroach upon his cool patience and determination. The gale seemed howling with rage at the truth here, still hidden from Adam’s eyes. Higher he raised himself.
The brush-covered structure farther from him was a sun shelter, and under it lay piles of camp duffle. A camp fire smoked. Adam’s swift eyes caught the gleam of guns. The day was too torrid for these campers to pack guns. The nearer structure was large, octagonal shape, built of mesquite posts and brush. From under it came the rumble of rocks and the metallic clink of shovels, and then the creak and crack and the heavy voice.
Still higher Adam pulled himself so that he might see under the brush shelter. A wide rent in the roof—a huge brown flash across this space—then lower down a movement of men to and fro—rumble of rocks, clink of shovel, thud of earth, creak and crack—a red undershirt—blue jeans—boots, and then passing, bending men nude to the waist—circle and sweep of long dark streak—then again the huge brown flash; it all bewildered Adam, so that one of his usually distinguishing glances failed to convey clear meaning of this scene. Then he looked and looked, and when he had looked a long, breathless moment he fell flat on the soft clay, digging his big hands deep, trembling and straining with the might of his passion to rush like a mad bull down upon the ruffians. It took another moment, that battling restraint. Then he raised to look with clearer, more calculating gaze.
The brush roof was a shelter for an arrastra. The octagonal shape of this sun shade filled the pocket that nestled between the slopes. Its back stood close to the ledge of crumbling rock from which the gold-bearing ore was being extracted. Its front faced the open gully. Under it an arrastra was in operation. As many of these Spanish devices as Adam had seen, no one of them had ever resembled this.
In the center of the octagon a round pit had been dug into the ground, and lined and floored with flat stones. An upright beam was set in the middle of this, and was fastened above to the roof. Crossbeams were attached to the upright, and from these crossbeams dragged huge rocks held by chains. A long pole, like the tongue of a wagon, extended from the upright and reached far out, at a height of about four feet from the ground. The principle of operation was to revolve the crossbeams and upright post, dragging the heavy rocks around and around the pit, thus crushing the ore. Adam knew that mercury was then used to absorb the gold from the crevices.