Yaqui sat his horse for a moment, motionless as stone, his dark face immutable and impassive.  Then he stretched wide his right arm in the direction of No Name Mountains, now losing their last faint traces of the afterglow, and he shook his head.  He made the same impressive gesture toward the Sonoyta Oasis with the same somber negation.

Thereupon he turned Diablo’s head to the south and started down the slope.  His manner had been decisive, even stern.  Lash did not question it, nor did Ladd.  Both rangers hesitated, however, and showed a strange, almost sullen reluctance which Gale had never seen in them before.  Raiders were one thing, Rojas was another; Camino del Diablo still another; but that vast and desolate and unwatered waste of cactus and lava, the Sonora Desert, might appall the stoutest heart.  Gale felt his own sink—­felt himself flinch.

“Oh, where is he going?” cried Mercedes.  Her poignant voice seemed to break a spell.

“Shore, lady, Yaqui’s goin’ home,” replied Ladd, gently.  “An’ considerin’ our troubles I reckon we ought to thank God he knows the way.”

They mounted and rode down the slope toward the darkening south.

Not until night travel was obstructed by a wall of cactus did the Indian halt to make a dry camp.  Water and grass for the horses and fire to cook by were not to be had.  Mercedes bore up surprisingly; but she fell asleep almost the instant her thirst had been allayed.  Thorne laid her upon a blanket and covered her.  The men ate and drank.  Diablo was the only horse that showed impatience; but he was angry, and not in distress.  Blanco Sol licked Gale’s hand and stood patiently.  Many a time had he taken his rest at night without a drink.  Yaqui again bade the men sleep.  Ladd said he would take the early watch; but from the way the Indian shook his head and settled himself against a stone, it appeared if Ladd remained awake he would have company.  Gale lay down weary of limb and eye.  He heard the soft thump of hoofs, the sough of wind in the cactus—­then no more.

When he awoke there was bustle and stir about him.  Day had not yet dawned, and the air was freezing cold.  Yaqui had found a scant bundle of greasewood which served to warm them and to cook breakfast.  Mercedes was not aroused till the last moment.

Day dawned with the fugitives in the saddle.  A picketed wall of cactus hedged them in, yet the Yaqui made a tortuous path, that, zigzag as it might, in the main always headed south.  It was wonderful how he slipped Diablo through the narrow aisles of thorns, saving the horse and saving himself.  The others were torn and clutched and held and stung.  The way was a flat, sandy pass between low mountain ranges.  There were open spots and aisles and squares of sand; and hedging rows of prickly pear and the huge spider-legged ocatillo and hummocky masses of clustered bisnagi.  The day grew dry and hot.  A fragrant wind blew through the pass.  Cactus flowers bloomed, red and yellow and magenta.  The sweet, pale Ajo lily gleamed in shady corners.