It became a race then, with the couple of miles between fugitives and pursuers only imperceptibly lessened. Nas Ta Bega had saved his mustangs and Shadd had ridden his to the limit. Shefford kept looking back, gripping his rifle, hoping it would not come to a fight, yet slowly losing that reluctance.

Sage began to show on the slope, and other kinds of brush and cedars straggled everywhere. The great rocks loomed closer, the red color mixed with yellow, and the slopes lengthening out, not so steep, yet infinitely longer than they had seemed at a distance.

Shefford ceased to feel the dry wind in his face. They were already in the lee of the wall. He could see the rock-squirrels scampering to their holes. The mustangs valiantly held to the gait, and at last the Indian disappeared between two rounded comers of cliff. The others were close behind. Shefford wheeled once more. Shadd and his gang were a mile in the rear, but coming fast, despite winded horses.

Shefford rode around the wall into a widening s.p.a.ce thick with cedars.

It ended in a bare slope of smooth rock. Here the Indian dismounted.

When the others came up with him he told them to lead their horses and follow. Then he began the ascent of the rock.

It was smooth and hard, though not slippery. There was not a crack.

Shefford did not see a broken piece of stone. Nas Ta Bega climbed straight up for a while, and then wound around a swell, to turn this way and that, always going up. Shefford began to see similar mounds of rock all around him, of every shape that could be called a curve. There were yellow domes far above, and small red domes far below. Ridges ran from one hill of rock to another. There were no abrupt breaks, but holes and pits and caves were everywhere, and occasionally, deep down, an amphitheater green with cedar and pinyon. The Indian appeared to have a clear idea of where he wanted to go, though there was no vestige of a trail on those bare slopes. At length Shefford was high enough to see back upon the plain, but the pursuers were no longer in sight.

Nas Ta Bega led to the top of that wall, only to disclose to his followers another and a higher wall beyond, with a ridged, bare, wild, and scalloped depression between. Here footing began to be precarious for both man and beast. When the ascent of the second wall began it was necessary to zigzag up, slowly and carefully, taking advantage of every level bulge or depression. They must have consumed half an hour mounting this slope to the summit. Once there, Shefford drew a sharp breath with both backward and forward glances. Shadd and his gang, in single file, showed dark upon the bare stone ridge behind. And to the fore there twisted and dropped and curved the most dangerous slopes Shefford had ever seen. The fugitives had reached the height of stone wall, of the divide, and many of the drops upon this side were perpendicular and too steep to see the bottom.

Nas Ta Bega led along the ridge-top and then started down, following the waves in the rock. He came out upon a round promontory from which there could not have been any turning of a horse. The long slant leading down was at an angle Shefford declared impossible for the animals. Yet the Indian started down. His mustang needed urging, but at last edged upon the steep descent. Shefford and the others had to hold back and wait. It was thrilling to see the intelligent mustang. He did not step. He slid his fore hoofs a few inches at a time and kept directly behind the Indian. If he fell he would knock Nas Ta Bega off his feet and they would both roll down together. There was no doubt in Shefford's mind that the mustang knew this as well as the Indian. Foot by foot they worked down to a swelling bulge, and here Nas Ta Bega left his mustang and came back for the pack-horse. It was even more difficult to get this beast down. Then the Indian called for La.s.siter and Jane and Fay to come down. Shefford began to keep a sharp lookout behind and above, and did not see how the three fared on the slope, but evidently there was no mishap. Nas Ta Bega mounted the slope again, and at the moment sight of Shadd's dark bays silhouetted against the sky caused Shefford to call out:

"We've got to hurry!"

The Indian led one mustang and called to the others. Shefford stepped close behind. They went down in single file, inch by inch, foot by foot, and safely reached the comparative level below.

"Shadd's gang are riding their horses up and down these walls!"

exclaimed Shefford.

"Sh.o.r.e," replied La.s.siter.

Both the women were silent.

Nas Ta Bega led the way swiftly to the right. He rounded a huge dome, climbed a low, rolling ridge, descended and ascended, and came out upon the rim of a steep-walled amphitheater. Along the rim was a yard-wide level, with the chasm to the left and steep slope to the right. There was no time to flinch at the danger, when an even greater danger menaced from the rear. Nas Ta Bega led, and his mustang kept at his heels.

One misstep would have plunged the animal to his death. But he was surefooted and his confidence helped the others. At the apex of the curve the only course led away from the rim, and here there was no level. Four of the mustangs slipped and slid down the smooth rock until they stopped in a shallow depression. It cost time to get them out, to straighten pack and saddles. Shefford thought he heard a yell in the rear, but he could not see anything of the gang.

They rounded this precipice only to face a worse one. Shefford's nerve was sorely tried when he saw steep slants everywhere, all apparently leading down into chasms, and no place a man, let alone a horse, could put a foot with safety. Nevertheless the imperturbable Indian never slacked his pace. Always he appeared to find a way, and he never had to turn back. His winding course, however, did not now cover much distance in a straight line, and herein lay the greatest peril. Any moment Shadd and his men might come within range.

Upon a particularly tedious and dangerous side of rocky hill the fugitives lost so much time that Shefford grew exceedingly alarmed.

Still, they accomplished it without accident, and their pursuers did not heave in sight. Perhaps they were having trouble in a bad place.

The afternoon was waning. The red sun hung low above the yellow mesa to the left, and there was a perceptible shading of light.

At last Nas Ta Bega came to a place that halted him. It did not look so bad as places they had successfully pa.s.sed. Yet upon closer study Shefford did not see how they were to get around the neck of the gully at their feet. Presently the Indian put the bridle over the head of his mustang and left him free. He did likewise for two more mustangs, while La.s.siter and Shefford rendered a like service to theirs. Then the Indian started down, with his mustang following him. The pack-animal came next, then Fay and Nack-yal, then La.s.siter and his mount, with Jane and hers next, and Shefford last. They followed the Indian, picking their steps swiftly, looking nowhere except at the stone under their feet. The right side of the chasm was rimmed, the curve at the head crossed, and then the real peril of this trap had to be faced. It was a narrow slant of ledge, doubling back parallel with the course already traversed.

A sharp warning cry from Nas Ta Bega scarcely prepared Shefford for hoa.r.s.e yells, and then a rattling rifle-volley from the top of the slope opposite. Bullets thudded on the cliff, whipped up red dust, and spanged and droned away.

Fay Larkin screamed and staggered back against the wall. Nack-yal was. .h.i.t, and with frightened snort he reared, pawed the air, and came down, pounding the stone. The mustang behind him went to his knees, sank with his head over the rim, and, slipping off, plunged into the depths. In an instant a dull crash came up.

For a moment there was imminent peril for the horses, more in the yawning hole than in the spanging of badly aimed bullets. La.s.siter drew Jane up a little slope out of the way of the frightened mustangs, and Shefford, risking his neck, rushed to Fay. She was holding her arm, which was bleeding. Unheeding the rain of bullets, he half carried, half dragged her along the slope of the low bluff, where he hid behind a corner till the Indian drove the mustangs round it. Shefford's swift fingers were wet and red with the blood from Fay's arm when he had bound the wound with his scarf. La.s.siter had gotten around with Jane and was calling Shefford to hurry.

It had been Shefford's idea to halt there and fight. But he did not want to send Fay on alone, so he hurried ahead with her. The Indian had the horses going fast on a long level, overhung by bulging wall. La.s.siter and Jane were looking back. Shefford, becoming aware of a steep slope to his left, looked down to see a narrow chasm and great crevices in the cliffs, with bunches of cedars here and there.

Presently Nas Ta Bega disappeared with the mustangs. He had evidently turned off to go down behind the split cliffs. Shefford and Fay caught up with La.s.siter and Jane, and, panting, hurrying, looking backward and then forward, they kept on, as best they could, in the Indian's course.

Shefford made sure they had lost him, when he appeared down to the left.

Then they all ran to catch up with him. They went around the chasm, and then through one of the narrow cracks to come out upon the rim, among cedars. Here the Indian waited for them. He pointed down another long swell of naked stone to a narrow green split which was evidently different from all these curved pits and holes and abysses, for this one had straight walls and wound away out of sight. It was the head of a canon.

"Nonnezoshe Boco!" said the Indian.

"Nas Ta Bega, go on!" replied Shefford. "When Shadd comes out on that slope above he can't see you--where you go down. Hurry on with the horses and women. La.s.siter, you go with them. And if Shadd pa.s.ses me and comes up with you--do your best.... I'm going to ambush that Piute and his gang!"

"Sh.o.r.e you've picked out a good place," replied La.s.siter.

In another moment Shefford was alone. He heard the light, soft pat and slide of the hoofs of the mustangs as they went down. Presently that sound ceased.

He looked at the red stain on his hands--from the blood of the girl he loved. And he had to stifle a terrible wrath that shook his frame. In regard to Shadd's pursuit, it had not been blood that he had feared, but capture for Fay. He and Nas Ta Bega might have expected a shot if they resisted, but to wound that unfortunate girl--it made a tiger out of him. When he had stilled the emotions that weakened and shook him and reached cold and implacable control of himself, he crawled under the cedars to the rim and, well hidden, he watched and waited.

Shadd appeared to be slow for the first time since he had been sighted.

With keen eyes Shefford watched the corner where he and the others had escaped from that murderous volley. But Shadd did not come.

The sun had lost its warmth and was tipping the lofty mesa to his right. Soon twilight would make travel on those walls more perilous and darkness would make it impossible. Shadd must hurry or abandon the pursuit for that day. Shefford found himself grimly hopeful.

Suddenly he heard the click of hoofs. It came, faint yet clear, on the still air. He glued his sight upon that corner where he expected the pursuers to appear. More cracks of hoofs pierced his ear, clearer and sharper this time. Presently he gathered that they could not possibly come from beyond the corner he was watching. So he looked far to the left of that place, seeing no one, then far to the right. Out over a bulge of stone he caught sight of the bobbing head of a horse--then another--and still another.

He was astounded. Shadd had gone below that place where the attack had been made and he had come up this steep slope. More horses appeared--to the number of eight. Shefford easily recognized a low, broad, squat rider to be Shadd. a.s.suredly the Piute did not know this country.

Possibly, however, he had feared an ambush. But Shefford grew convinced that Shadd had not expected an ambush, or at least did not fear it, and had mistaken the Indian's course. Moreover, if he led his gang a few rods farther up that slope he would do worse than make a mistake--he would be facing a double peril.

What fearless hors.e.m.e.n these Indians were! Shadd was mounted, as were three others of his gang. Evidently the white men, the outlaws, were the ones on foot. Shefford thrilled and his veins stung when he saw these pursuers come pa.s.sing what he considered the danger mark. But manifestly they could not see their danger. a.s.suredly they were aware of the chasm; however, the level upon which they were advancing narrowed gradually, and they could not tell that very soon they could not go any farther nor could they turn back. The alternative was to climb the slope, and that was a desperate chance.

They came up, now about on a level with Shefford, and perhaps three hundred yards distant. He gripped his rifle with a fatal a.s.surance that he could kill one of them now. Still he waited. Curiosity consumed him because every foot they advanced heightened their peril. Shefford wondered if Shadd would have chosen that course if he had not supposed the Navajo had chosen it first. It was plain that one of the walking Piutes stooped now and then to examine the rock. He was looking for some faint sign of a horse track.

Shadd halted within two hundred yards of where Shefford lay hidden. His keen eye had caught the significance of the narrowing level before he had reached the end. He pointed and spoke. Shefford heard his voice.

The others replied. They all looked up at the steep slope, down into the chasm right below them, and across into the cedars. The Piute in the rear succeeded in turning his horse, went back, and began to circle up the slope. The others entered into an argument and they became more closely grouped upon the narrow bench. Their mustangs were lean, wiry, wild, vicious, and Shefford calculated grimly upon what a stampede might mean in that position.

Then Shadd turned his mustang up the slope. Like a goat he climbed.

Another Indian in the rear succeeded in pivoting his steed and started back, apparently to circle round and up. The others of the gang appeared uncertain. They yelled hoa.r.s.ely at Shadd, who halted on the steep slant some twenty paces above them. He spoke and made motions that evidently meant the climb was easy enough. It looked easy for him. His dark face flashed red in the rays of the sun.

At this critical moment Shefford decided to fire. He meant to kill Shadd, hoping if the leader was gone the others would abandon the pursuit. The rifle wavered a little as he aimed, then grew still. He fired. Shadd never flinched. But the fiery mustang, perhaps wounded, certainly terrified, plunged down with piercing, horrid scream. Shadd fell under him. Shrill yells rent the air. Like a thunderbolt the sliding horse was upon men and animals below.

A heavy shock, wild snorts, upflinging heads and hoofs, a terrible tramping, thudding, shrieking melee, then a brown, twisting, tangled ma.s.s shot down the slant over the rim!

Shefford dazedly thought he saw men running. He did see plunging horses.

One slipped, fell, rolled, and went into the chasm.

Then up from the depths came a crash, a long, slipping roar. In another instant there was a lighter crash and a lighter sliding roar.

Two horses, shaking, paralyzed with fear, were left upon the narrow level. Beyond them a couple of men were crawling along the stone. Up on the level stood the two Indians, holding down frightened horses, and staring at the fatal slope.

And Shefford lay there under the cedar, in the ghastly grip of the moment, hardly comprehending that his ill-aimed shot had been a thunderbolt.

He did not think of shooting at the Piutes; they, however, recovering from their shock, evidently feared the ambush, for they swiftly drew up the slope and pa.s.sed out of sight. The frightened horses below whistled and tramped along the lower level, finally vanishing. There was nothing left on the bare wall to prove to Shefford that it had been the scene of swift and tragic death. He leaned from his covert and peered over the rim. Hundreds of feet below he saw dark growths of pinyons. There was no sign of a pile of horses and men, and then he realized that he could not tell the number that had perished. The swift finale had been as stunning to him as if lightning had struck near him.

Suddenly it flashed over him what state of suspense and torture Fay and Jane must be in at that very moment. And, leaping up, he ran out of the cedars to the slope behind and hurried down at risk of limb. The sun had set by this time. He hoped he could catch up with the party before dark.

He went straight down, and the end of the slope was a smooth, low wall.

The Indian must have descended with the horses at some other point. The canon was about fifty yards wide and it headed under the great slope of Navajo Mountain. These smooth, rounded walls appeared to end at its low rim.