"I am going back to the hotel to lie down for an hour," announced Grace. "Tom, you may go out and do a little shopping for me while I am resting. Girls," she said, turning to her companions, "I would suggest that all of you turn in for a beauty sleep. You will need it, for we shall have a hot, dusty ride between here and the mountains, which we shall not reach until some time this evening. If you have any further purchases to make at the general store, you had better make them now, or let Tom do it for you. We must be on time at the corral. Mr. Lang probably has timed our departure to fit certain plans of his own."

The girls said they had completed their purchases, and shortly after that all were sound asleep, fortifying themselves for the experiences before them, experiences that were destined to be the most strenuous that they had ever met with, outside of the battle front in France.

CHAPTER III

A THRILLING MOMENT

"We are ready, Mr. Lang," greeted Grace Harlowe as she and her party came up to the corral where the guide was supervising the saddling of the ponies for the outfit.

The girls now wore the overseas uniforms that they had worn in their ride over the Old Apache Trail. In addition, a red bandana handkerchief was twisted about the neck of each Overland Rider, in true western style, to keep the alkali dust from sifting down their necks.

All the equipment except mess kits and emergency rations, and a canteen of water for each, had been sent forward on the burros in charge of the Chinaman, Ping Wing, whom the Overland girls had not yet met.

"How is Blackie behaving at present, Mr. Lang?" questioned Grace, stepping over towards the guide, who was readjusting the cinch- girth on the little animal.

"Quiet as a kitten after finding a nest of young mice. Better put your revolver in the saddle holster where it will be handy. That's where I carry mine. The lieutenant is stowing his now. Never know when the 'hardware' is going to come in handy on the desert."

A lump of sugar found its way into the black bronco's mouth from Grace Harlowe's hand, as she petted and talked to the little fellow. This time his ears were tilted forward, and he stood motionless while his new master was caressing him. The instant Grace stepped away, however, the black grew restless. He dragged the cowboy who was holding him and threatened to break away, nor was he quieted until Grace herself intervened and, slipping the bridle rein over her arm and leading the pony, walked over to Tom Gray.