"There doesn't seem to be much probability of our meeting strangers in this desolate place," commented the Professor. "What time do you think we shall see you back? Have you any idea?"
"Somewhere about sunset, in all probability."
"I'd like to go along with Tad," said Stacy.
"Why—no, I think you'd better not," said the Professor.
"Please. I know I shall be able to help him. You do not need two boys in camp with you, Professor."
"Yes; he might as well go along, if he wants to," decided the guide.
"Very well, then. But Walter must remain here."
"Use your old ponies. Do not take the stallions," advised Parry. "If the stallions were to get away from you while you are off on the desert alone it would leave you, and perhaps us as well, in pretty bad shape. And, by the way, Professor, when you begin firing your signals, go to the top of the hill yonder and shoot straight up into the air. The sound will carry further than were you to shoot from here. You've no idea how perplexing this Desert Maze is to those not familiar with it and its tricks."
"I'm learning fast," smiled the Professor. "Furthermore, I am convinced that I shall know all about it if I live long——"
"Never," answered Parry promptly. "No man ever lived who knew all about the desert. I——"