Greenfield stopped, sat down, and waited.  After half an hour he drew himself to his feet, moved on, then stopped, returned, approached, and listened to the crooning of the delirious man.  Suddenly satisfied, he flung both arms into the air in frenzied triumph, turned, staggered, and reeled away, while back over the desert came the grotesque, hideous refrain, in maddened victory: 

     “Yankee Doodle Dandy oh! 
      Yankee Doodle Dandy!”

Frawley watched him go, then with a sigh of relief turned his glance to the black revolving form in the air—­at least that remained to break the horror of the solitude.  Then he lost consciousness.

The beat of wings across his face aroused him with a start and a cry of agony.  The great bird of carrion, startled in its inspection, flew clumsily off and settled fearlessly on the ground, blinking at him.

An immense revolt, a furious anger brought with it new strength.  He rose and rushed at the bird with clenched fist, cursing it as it lumbered awkwardly away.  Then he began desperately to struggle on, following the tracks in the sand.

At the end of an hour specks appeared on the horizon.  He looked at them in his delirium and began to laugh uneasily.

“I must be out of my head,” he said to himself seriously.  “It’s a mirage.  Well, I suppose it is the end.  Who’ll they put on the case now?  Keech, I suppose; yes, Keech; he’s a good man.  Of course it’s a mirage.”

As he continued to stumble forward, the dots assumed the shape of trees and hills.  He laughed contemptuously and began to remonstrate with himself, repeating: 

“It’s a mirage, or I’m out of my head.”  He began to be worried, saying over and over:  “That’s a bad sign, very bad.  I mustn’t lose control of myself.  I must stick to him—­stick to him until he dies of old age.  Bucky Greenfield!  Well, he won’t get out of this either.  If the department could only know!”

The nearer he drew to life, the more indignant he became.  He arrived thus at the edge of trees and green things.

“Why don’t they go?” he said angrily.  “They ought to, now.  Come, I think I’m keeping my head remarkably well.”

All at once a magnificent idea came to him—­he would walk through the mirage and end it.  He advanced furiously against an imaginary tree, struck his forehead, and toppled over insensible.

VII

Frawley returned to consciousness to find himself in the hut of a half-breed Indian, who was forcing a soup of herbs between his lips.

Two days later he regained his strength sufficiently to reach a ranch owned by Englishmen.  Fitted out by them, he started at once to return to El Paso; to take up the unending search anew.

In the late afternoon, tired and thirsty, he arrived at a shanty where a handful of Mexican children were lolling in the cool of the wall.  At the sound of his approach a woman came running to the door, shrieking for assistance in a Mexican gibberish.  He ran hastily to the house, his hand on his pistol.  The woman, without stopping her chatter, huddled in the doorway, pointing to the dim corner opposite.  Frawley, following her glance, saw the figure of a man stretched on a hasty bed of leaves.  He took a few quick steps and recognized Greenfield.